#Smc fan control kernel panic

[tastebanana]

Smc fan control kernel panic

#SMC FAN CONTROL KERNEL PANIC UPDATE#

#SMC FAN CONTROL KERNEL PANIC ISO#

#SMC FAN CONTROL KERNEL PANIC MAC#

#SMC FAN CONTROL KERNEL PANIC MAC#

This is just to document that I was able to compile and load an asmc.ko module for a Mac Mini 6,1. But I searched for "Mac Mini smc fan control" and this thread came up as one of the first ones. But this was kind of defeating the purpose of using pfsense for me, since I was trying to move away from arch Linux for the sake of stability. Īlthough it does seem according to this that the asmc module does support my mac mini here, but it is in a later version of the kernel, so I could back port the asmc.h and asmc.c changes, build the kernel and it should work.

#SMC FAN CONTROL KERNEL PANIC UPDATE#

Unfortunately I found that my version of the Mac Mini is not supported by the kernel module, and I'd have to update the C header and class files (asmc.c and asmc.h) and build my own version of the 11.3 kernel just to get the kernal module to function. Extracted the asmc.ko file from the iso, and ran kldload.

#SMC FAN CONTROL KERNEL PANIC ISO#

I went downloaded free BSD 11.3, that's the version of free BSD iso you need to download as the current stable version of pfsense uses that kernel, hence your error above). Ok, I thought I'd let you guys know where I got to, Ipmitool-1.8.18_2 CLI to manage IPMI kldstat | grep it looks like I am missing the ipmi.ko module. I have the sysctl -a | grep -i pkg info | grep ipmi So, since I have the 2011 Mac Mini server, I was thinking I should have a motherboard or logic board management controller and checked whether I have the ipmi-tool. Ipmitool-1.8.17_1 CLI to manage IPMI systems ipmitool sensor | grep -i fan | cut -f1-4 -d'|' while researching, I found this:Ĥ 1 0xffffffff81cc1000 113b0 ipmi.ko pkg info | grep ipmi can you share more like a link to how Okay, understand what you're saying. Yeah, import the kernel module from an equivalent FreeBSD iso. Sysctl: unknown oid said in Apple smc fan control: I also ran the command and I got the sysctl dev.asmc -a | grep -i asmc Will I have to compile my own kernal/kernal module to use this functionality? However, this does not appear in the release build. This does appear to be available in the pfsense freeBSD src ->. This setup is working really well apart from one issue, the os doesn't appear to have the kernal module for apple's smc fan control. I have setup an older macmini (5,1) as a gateway using pfsense, one ethernet port using the onboard broadcom the other a thunderbolt to ethernet adapter.

[motobanana]

Smc fan control kernel panic

#Smc fan control kernel panic install

#Smc fan control kernel panic update

#Smc fan control kernel panic windows

All Intel Macs supported + any conflicting programs are automatically.

#Smc fan control kernel panic windows

Lots of guesswork, but a positive outcome. Mac/SMC Fan Control for Windows (+ Temp) - Allows control of fans in Apple computers in Windows and monitoring of temperatures. If it is on the 30-second timer, it might only cause Fusion to fail once the system has been running for a while (8-9 hours?), but that's just a guess too. I don't see any exceptions being logged anywhere, though. 4 GB, SMC 1.68f96 Graphics: Intel HD Graphics 3000, Intel HD Graphics 3000, Built-In, 384 MB Memory. From a super quick glance at the source, my guess is that an exception is being raised somewhere between smc_init() and smc_close(), leading to the process "leaking" the AppleSMCClient during some routine operation, probably one of the checks on a 30-second timer. It might be possible to contact the author and request their assistance with evaluating the problem.

#Smc fan control kernel panic update

Sometimes an update of the third-party software can resolve issues, but in this case it's already at version 2.1.8, which is the most recent available for now. Kernel Panic after quitting all applications and Control Eject to shut down. My guess is that some sort of defect in InsomniaX (or perhaps a conflict with Fusion) is causing it to exhaust AppleSMC's ability to handle userspace requests, leading to Fusion being unable to talk to the host's SMC, and the failure we see here. So clearly InsomniaX is not happy with something, and is interacting with the host's SMC. over 1,000 connections from just process ID 1051. I also try to run the current version of another fan controll utility called smcFanControl (version is 2. That file contains an I/O registry dump which includes information about what's "connected" to the AppleSMC service, and it includes the usual stuff. If you just came here, read the backstory: The LG UltraFine 5K. There I was, having enjoyed a short moment of a bug-free setup, and it was interrupted yet again. I ignored it the first time, but it started to become an everyday thing.

#Smc fan control kernel panic install

I used the default settings for New VM -> Install OS X from Recovery Partition and I get a kernel panic and the message. On March 24, 2020, my 16-inch MacBook Pro greeted me with a kernel panic. Im using Fusion 8.5.6 on my macbook running 10.12.4 and I am trying to install it from the recovery partition. For fun and education: I grepped through the support bundle for "SMC", and found a bunch of hits in system_profiler.txt. Kernel panic and 'SMC returned incorrect key' when attempting to install 10.12 sierra from recovery partition.

[huntergator65]

Restart Smc Macbook Pro

Mac or MacBook stuck when shutting down or restarting? How to fix?

You might finish work on your Mac, attempt to shut it down, only to find that it is stuck on a desktop picture without any icons. Or perhaps the MacBook freezes on a black screen, but you can still hear sounds from the device (HDD, etc.) Furthermore, you might attempt to unplug the power adapter and remove the battery, but still notice that the computer has not completely shut down. If you encounter these issues when attempting to restart or shut down a Mac computer, this article may be useful.

If you have a MacBook without a removable battery, you can reset the SMC by turning on your computer while holding a specific keyboard shortcut. Here’s what to do. Unplug the power, then shut down your Mac. Hold the left Shift+Control+Option keys down, then press and hold the power button down.

Unfortunately, many people encounter these problems, which commonly arise following an operating system update. Windows users who have recently switched to a Mac computer will probably not be too surprised, since this is a common issue on Windows platforms. Fortunately, Macs have built-in tools to solve these problems. The first step when troubleshooting these issues is to force the Mac to shut down and reset System Management Controller (SMC) and Non-Volatile Random-Access Memory (NVRAM). Follow this guide to resolve Mac restart and shut down issues.

Apple tells you when you should reset your SMC and all of the reasons have to do with power, temp, sleep, etc. It will not have any effect on software, keyboard, or wireless. It will not have any effect on software, keyboard, or wireless.

Follow the steps below to Reset SMC on newer versions of MacBook Air and MacBook Pro laptop computers (2018 and later). Click on Apple Menu Shut Down and wait for your Mac to shut down.

Table of Contents:

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What is SMC and what is its function?

System Management Controller (SMC) is a low-level Mac hardware component that controls computer power consumption, battery charging and functionality, thermal and fan activity, GPU and video mode functionality/video output, sleep/wake modes and led lightning management, and other hardware functionality. Resetting the SMC might solve issues related to these devices.

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Reset SMC of a MacBook Air, MacBook Pro Retina, or MacBook Pro with an integrated battery

First, shut down the device and connect the power adapter to the Mac.

Hold down the Shift, Control and Option keys while clicking the power button.

Finally, release all keys simultaneously - the light on the MagSafe adapter might change color to signify that SMC has been reset.

After a successful reset, reboot the computer in the usual way.

To reset SMC on a non-portable device, follow these instructions:

Shut down the Mac.

Disconnect the power cord.

Hold down the Mac power button for five seconds.

Release the button, reattach the power cable, and boot the Mac in the usual way.

For more information and detailed instructions read this guide.

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Reset NVRAM

NVRAM (non-volatile random-access memory) is small area of Mac memory that stores certain settings in a location accessible by the macOS. The memory area stores information such as speaker volume, screen resolution, startup disk selection, and any recent kernel panic reports. To reset the NVRAM, shutdown the Mac. Turn it on, and after the loading chime, hold down the Option, Command, P and R buttons together. Keep holding this combination for at least 20 seconds. The display should appear as if the computer is restarting. If you hear the start up chime again, release the buttons.

What is a kernel panic?

Sometimes shutdown problems are caused by recent 'kernel panic' events - resetting the NVRAM should solve these issues. Kernel panics often result in various system crashes involving restarts and shutdowns. A kernel panic is essentially a system error when the Mac operating system is unable to quickly or easily recover. These errors are commonly the result of actions when the Mac attempts to write or access memory incorrectly. They are often caused by corrupted software, software bugs, or malware. Sometimes, they are caused by damaged or incompatible hardware, including faulty external devices connected to the Mac.

Launch Apple Diagnostics or Apple Hardware Test

Apple Diagnostics and Apple Hardware Test are built-in tools that can help to diagnose problems related to the Mac's internal hardware, including parts such as system memory, logic board, and wireless components. Furthermore, these tools are accessible even if the MacBook (or other Apple computer) is unable to boot properly. Follow the steps below to run the diagnostic tool.

Before you start troubleshooting, bear in mind that none of these tools are able to inspect external components, such as external storage or devices, not manufactured by Apple. Also, these particular tools examine hardware only and do not check operating system status.

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For Macs released after 2013, owners should look for Apple Diagnostics, which is included in their computers.

For computers released in 2012 or earlier and running OX X version 10.8.4 or later, use Apple Hardware Test, which is also included with the system.

If you have a Mac that was released in 2012 or earlier and running OS X version 10.8.3 or earlier, use the system software disc or USB flash drive that came with the Mac.

How to run Apple Diagnostics

Disconnect all external devices except the keyboard, mouse or trackpad and display. When all unnecessary components are disconnected, restart the Mac, and then press and hold down the D key while the computer restarts. Apple Diagnostics launches automatically - follow the on-screen instructions to proceed and a list with the problem detected will be displayed.

How to run Apple Hardware Test

Unplug all external components except the keyboard, mouse or trackpad and display. When all external devices are disconnected, restart the Mac, press and hold down the D key while the computers restarts. When Apple Hardware Test launches, a window with a list of languages will appear. Choose your preferred language and press Return or click the right arrow. If Apple Hardware Test did not launched, try to run it from the Internet. Reconnect the Apple computer to the network through Wireless or Ethernet and then restart. After the start up chime plays, hold down the Option and D keys. When Apple Hardware Test prompts, select your preferred language and follow the on-screen instructions. If the tool detects problems, they will be displayed on screen. Freedom book social media. Take a note of these details for contacting Apple Support or a certified service provider.

Try booting in a Safe Mode

A Safe Boot deletes system caches, rebuilds the Mac boot database on the hard drive - this frequently solves various issues. Furthermore, Safe Mode is probably the best way to check if the issue is global or limited to a particular user folder. Shut down and restart issues might be related to third-party software that is loading automatically. Safe Mode checks the system for errors and attempts to solve detected errors.

Reset Smc Macbook Pro 2019

To enter Safe Mode, first shut down the Mac using whichever method works in your situation. When the computer has completely shut down, wait for approximately 10 seconds and press the power button again. When you hear the start up chime, immediately press and hold the Shift key, and release it when you see the Apple logo and progress indicator.

Bear in mind that safe boot takes much longer than usual, since the computer loads and also performs a system check. If the Mac works correctly, click the Apple logo and select restart.

Use terminal to clear your Mac

Experienced users often use Terminal to solve various issues - in this case, it also contains various options to try. First, open Terminal by using spotlight - hold command and press the spacebar, and type Terminal. Alternatively, go to the utilities folder through finder. Once Terminal has launched, type the following commands one-by-one and press Return after each command.

rm -rf ~/Library/Caches/*

rm -rf ~/Library/Saved Application State/*

sudo rm -rf /Library/Caches/*

sudo rm -rf /System/Library/Caches/*

atsutil databases -removeUser

sudo atsutil databases -remove

sudo atsutil server -shutdown

sudo atsutil server -ping

sudo rm -rf /var/folders/*

When you have tried all commands, restart the Mac.

Alternative methods to solve your shut down and restarting issues:

We recommend Combo Cleaner to clean Mac cache files and malware.

Remove all printers by going to System Preferences and selecting Printers & Scanners, and then add the required devices again.

Before shut down or restart, force quit any running apps by pressing Command, Option and Esc together.

Relaunch Finder before shut down from the force quit menu.

Ensure, the Trash is empty.

Try to shut down the mac via Terminal, type sudo shutdown -r now and press Return.

Enter Recovery Mode by holding Command and R while booting, go to disk Utility and run Repair disk, or First Aid to the hard drive.

Video Showing how to solve issue Mac stuck while shutting down or restarting:

How to reset your SMC on any Mac?

You may have noticed reduced Apple computer functionality, tried several methods to reset your Mac, but are still unable to find a solution. Furthermore, if you are not an experienced IT user, you may not be aware of components such as SMC (System Management Controller) and others.

System Management Controller is a low-level Mac hardware component that controls computer power consumption, battery charging and functionality, thermal and fan activity, GPU and video mode functionality/video output, sleep/wake modes and led lightning management, and other hardware functionality. Resetting the SMC might solve issues related to these devices. In this article, we describe common issues and ways to reset the System Management Controller for the most popular Apple products.

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Table of Contents:

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The most popular issues related to SMC

Resetting the SMC will not return your computer to new, but it is a useful tool to solve many hardware problems.

A list of the most common problems that SMC reset might solve:

Problems with Mac cooling fans and fan management. For example, fans running at high speed despite normal CPU usage and temperature, or fans not working at all. In the last case, if a reset does not solve the issue, check that the fan is not impeded.

Power management and battery life problems. For example, the Mac does not power up, does not transition to 'wake' mode from 'sleep', unwanted revert to 'sleep', or portable Mac not responding to lid opening and closing.

Lightning issues. For example, battery indicator lights not working, unable to manage display or keyboard back lights, or lights not working at all.

Video and external displays do not work properly. For example, video mode and external display not working correctly, or at all.

General performance and functionality problems. For example, poor computer performance and responsiveness (perhaps caused by partial CPU or hard disk usage), external ports with Airport and Bluetooth do not work, cannot detect or mount external devices or drives.

If you experience one or more of these problems, perform an SMC reset by following the instructions below for most Apple models.

Reset SMC of a MacBook Air, MacBook Pro Retina, or MacBook Pro with an integrated battery

Before you proceed, bear in mind that, by resetting the SMC, you are erasing all data such as power settings, sleep schedule, and other customizations. All settings will revert to their defaults.

The path to reset SMC on most Apple laptops, which have none-removable battery:

First, shut down the device and connect the power adapter to the Mac. Hold down the Shift, Control and Option keys while clicking the power button. Finally, release all keys simultaneously - the light on MagSafe adapter may change color to signify that SMC has been reset. After a successful reset, reboot your computer in the usual way.

Reset your SMC on iMac, Mac Pro, Mac Mini

Note that performing an SMC reset for a non-portable Apple device is different for portable devices. As with MacBooks and portable devices, however, the procedure is straightforward and any problems with SMC on a desktop Mac will be similar to those of a laptop.

To reset SMC on a non-portable device, follow these instructions:

Restart Smc Macbook Pro 2015

Shut down the Mac.

Disconnect the power cord.

Hold down the Mac power button for five seconds.

Release the button, reattach the power cable, and boot the Mac in the usual way.

Reset SMC of a MacBook or MacBook Pro's with removable battery

Some earlier Apple laptops had detachable batteries, so the SMC reset is performed in a slightly different way to newer models.

To perform an SMC reset follow these instructions:

Shutdown the MacBook or MacBook Pro and remove the battery. Disconnect the power adapter, hold the power key for 10 seconds. Release the button and reattach your power adapter and battery. Turn on the Mac in the usual way.

Alternative method for Mac Pro manufactured in 2012 or earlier

If you own a Mac Pro produced in 2012 or before, and the normal reset (described earlier) did not work, try a manual SMC reset: press the reset button located on the Mac Pro motherboard.

Now, follow these instructions to manually reset the SMC:

Shut down the Mac.

Unplug the Mac power cord.

Open the Mac Pro side access panel.

Below the Drive 4 sled and adjacent to the top PCI-e slot, you should find a small button labeled SMC. Press and hold down this button for 10 seconds.

After resetting, close the Mac Pro side access panel, reconnect the Mac power cord, wait for at least five seconds, and then turn the computer back on by pressing the power button.

After the Mac SMC has been reset, hardware issues should be resolved. If you continue to experience the same problems, there might be more serious, or different, issue that need to be troubleshooted separately.

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My Macbook Pro Is Restarting On Its Own

Why does my MacBook pro keep restarting on its own?

Unexpected restarts are usually caused by software installed on your Mac, or by devices connected to your Mac. If the issue causes your Mac to restart every time it attempts to start up, your Mac might eventually shut down.

Why does my MacBook keep restarting because of a problem?

Merely starting your Mac in Safe Mode is not intended to resolve the problem, it's to observe its performance without certain additional components. To end Safe Mode restart your Mac normally. Shutdown will take longer as well. Some users have reported an SMC resetto be beneficial. Check the hardware inside your Mac. Please don’t be nervous; you are not required to do it yourself. Apple has many bricks-and-mortar stores, and you can easily get help there. Further reading: Common boot problems after macOS Big Sur update. Coming with the biggest design update, macOS Big Sur made its appearance in June 2020.

Macbook Is Restarting On Its Own

There can be many reasons why your MacBook keeps rebooting. The most common issue is conflicting applications. Another issue could be incompatible hardware or peripheral devices. It could be an issue of not enough RAM or hard drive space.

How do I fix kernel panic on MacBook Pro?

HardwareShut down your Mac and disconnect all hardware except your keyboard and mouse. If you use a third-party keyboard and mouse, swap them for the Apple versions, where possible. Restart your Mac. Shut down your Mac again and re-connect one device. Restart your Mac.

Why does the sound keep cutting out on my MacBook pro?

Fortunately, this problem is easy to fix. Head over to your System Preferences in the Apple Menu, and look for the Sound icon. Try setting the sound to Internal Speakers. While you are at it, take a look at the volume bar below and make sure that your output volume is turned up and Mute is unchecked.

How do I reset the sound on my MacBook?

Click “System Preferences” in the dock and then click “Sound,” located under the Hardware section. Click the “Output” tab and make sure that the proper sound output device is selected. For instance, if you are using built-in speakers, you should have “Internal Speakers” highlighted.

How do I reset the PRAM on my MacBook Pro?

You can reset or “zap” the PRAM on a Mac by pressing and holding the Command, Option, P, and R keys right as you turn the computer on. Yes, there are four keys you need to hold down at the same time. Once your hear the startup chime a second time, the PRAM has been reset and you can release the keys.

How do you know if SMC is reset?

Here are the steps: Reset SMC….4 AnswersCharging indicator is orange light when machine powered off.Keep pressing Shift + Option + Control + Power for 10 seconds and indicator is still orange.Indicator turns to green when release all keystrokes and keeps almost 1 second.Light turns to orange then.

How do you clear RAM on a Mac?

6:23Suggested clip · 92 secondsHow to free up RAM on Mac – YouTubeYouTubeStart of suggested clipEnd of suggested clip

Does SMC reset delete files?

Resetting the SMC will not delete any saved data on the computer, but rather reset certain settings on the computer; ultimately speeding up your Mac.

Is it bad to reset SMC on Mac?

You could try resetting the SMC, or System Management Controller, as a last resort. The SMC manages low level settings, like thermal and battery management. It’s rare, but problems with the SMC can effect performance, and also cause bugs like fans that run constantly even when CPU usage isn’t high.

What does the SMC reset do?

An SMC or System Management Controller Reset can fix various power related issues, such as a piece of hardware not functioning correctly.

How do you clean up your Mac and make it run faster?

13 Ways To Make Your Mac Run Faster Right NowDelete the programs you don’t use anymore. Screenshot. Free up hard drive space in general. Run Monolingual! Close memory-hogging processes. If you still actually use Dashboard, get rid of the widgets you don’t use. Add more memory. Clean up the apps that launch at startup. Update your software!

How do I fix a slow Macbook Pro?

Let’s start with the basics—when your Mac is getting slow, follow these troubleshooting steps to make it faster.Backup Your data. Restart Your Mac. Check Resource Usage. Check Available Storage Space. Test the Hardware. Upgrade Your Mac. Take Your Mac to Apple’s Genius Bar.

Why does my Mac run so slow?

If you find your Mac is running slowly, there are a number of potential causes that you can check. Your computer’s startup disk may not have enough free disk space. Quit any app that isn’t compatible with your Mac. For example, an app may require a different processor or graphics card.

Can you defrag a Mac?

Apple, on the other hand, has never included defragging software in macOS. Modern Macs defrag files automatically, they’ve done this since OS X 10.2 launched in 2002. Defragging can damage a drive because moving files around wears the drive out.

Is there a disk cleanup utility for Mac?

Disk Cleanup Pro is among the free utilities in the Mac App Store, and others can be found online. As with all maintenance programs, however, read the reviews before you download and back up your Mac before using software intended to automatically delete files on your computer — just in case.

How can I check my Mac for viruses?

My Macbook Pro Keeps Restarting On Its Own

A good start to scan your Mac for viruses is to see whether you have applications installed that you don’t recognize:Go to the Applications folder via Go > Applications in Finder or using the shortcut Shift + Command + A .Scroll through the list and delete any unknown applications.Then empty the trash.

How do you clean up a Mac?

Optimize the inside of your Mac with a clean-upStep One: Update your software. Step Two: Tidy up your start up. Step Three: Clean out unused apps. Step Four: Clean out the downloads folder. Step Five: Tidy up your storage disk. Step Six: Clean out the cache. Step 7: Remove resource-hungry programs. Step 8: Take out the trash.

Why is Mac system storage so high?

It’s likely that much of it is accounted for by cache files for apps like Photos and Safari. MacOS caches as much data as it can to avoid having to re-download it, which boosts performance. System storage can occupy tens of gigabytes of space on your Mac for Time Machine backups and cache files.

How do I clean up my macbook pro?

You can quickly clean up your Mac with these easy steps.Clean up cache. You’ve probably heard “Remove your cache” as a web browser troubleshooting tip. Uninstall apps you don’t use. Clean out useless duplicates. Empty the trash. Reduce clutter. Delete large and old files. Remove old iOS backups. Wipe out Language files.

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Take Control of Troubleshooting Your Mac, Third Edition - Joe Kissell

Take Control of Troubleshooting Your Mac, Third Edition Joe Kissell Genre: Computers Price: $14.99 Publish Date: January 23, 2019 Publisher: Alt concepts inc. Seller: alt concepts inc. Updated January 23, 2019 Macs are generally quite reliable as computers go, but they can still experience significant problems. In this essential guide from best-selling author Joe Kissell, you'll learn key troubleshooting skills that will help you address the most common and frustrating Mac irritations. You'll also learn what to do when you encounter a problem for which you can't find a ready-made solution. (Step one: Don't panic!) Whether your Mac won't turn on, experiences crashes or kernel panics repeatedly, can't connect to the internet, or exhibits any of numerous other misbehaviors, this book has the calm, friendly advice you need to find a solution. This book covers 10.9 Mavericks or later, including 10.14 Mojave. You'll learn these 17 basic troubleshooting procedures (along with the reasons they can help): -- Force-quit an app -- Restart your Mac -- Log in to another user account -- Start up from another volume -- Run disk repair utilities -- Erase and restore from a backup -- Repair permissions (in Yosemite and earlier) -- Start up in safe mode -- Check preference files -- Reset NVRAM or SMC -- Use Activity Monitor -- Check free disk space -- Check log files -- Clear caches -- Check your RAM -- Test for reproducibility -- Get system information Joe also explains how to solve 21 common problems, including: -- Your Mac won't turn on -- Your Mac stalls during startup -- Your Mac keeps turning itself off -- Your fan runs excessively -- Your Mac is abnormally slow (read Take Control of Speeding Up Your Mac for full details) -- You can't empty the Trash -- An app grinds to a halt -- An app crashes -- You experience repeated kernel panics -- The keyboard or mouse doesn't work -- You lose your internet connection -- Printing doesn't work -- Spotlight searches fail -- Keychain (seemingly) forgets passwords -- Apple Mail fails to connect -- Time Machine misbehaves -- A volume won't unmount -- The "Open With" menu contains errors -- iCloud Data doesn't sync properly -- Continuity features fail -- Your laptop's battery misbehaves http://bit.ly/2EGfLHX

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5 Warning Signs Your Mac Has a Problem (And What to Do About Them)

Your Mac is not immune to problems. Occasionally, issues crop up in either macOS or your computer components. They can gradually worsen over time, or occur suddenly.

 Sometimes your Mac will give a warning sign before these become major issues. It’s up to you to take notice and keep a close watch on the system. We’ll show you some common warning signs and discuss how to fix these problems.

 1. Mac Won’t Turn On

 You press the power button on your Mac, and nothing happens. There’s no power light, no sound, and a completely black screen. Instead of panicking, try these steps one at a time to diagnose the problem:

 Check the power connections to make sure they’re secure on both ends. Next, check the wires for damage and try a different charger or cable.

 Check the video-out cable connection with the external display (if any). Also, try raising the monitor brightness to make sure that it’s not turned down extremely low.

 There might be a problem with your accessories. Unplug all peripherals except your keyboard and mouse, then try to boot. Plug in your peripherals after a reboot and see if it all works properly.

 Perform a power cycle. On a modern MacBook, press the power button and hold it for ten seconds. If your Mac is running, it’ll cut the power and force it to restart. On a desktop Mac, unplug the cable and wait ten seconds. Then plug it in and restart.

 Reset the SMC and NVRAM. This is the last step you should try before taking your Mac in for a repair.

See our dedicated guide to get your Mac booting again if you still have trouble.

 2. Mac Stalls During Startup

 Once you power on your Mac, a sequence of booting events occurs until the login screen or desktop appears. But if the startup process gets stuck, no matter how long you wait, you’ll see only a plain gray screen or one with symbols.

 Depending on what you see, follow these instructions.

 Plain Gray Screen

If you have a simple gray screen when you boot, here’s what to do:

 Faulty peripherals are the primary cause of gray screen problems. Thus, you should detach all wired accessories, then press and hold the power button to shut down your Mac. Plug in one peripheral after each restart to find the culprit.

 Try a Safe mode boot. If your Mac completes the startup process here, restart again in normal mode and verify that your startup drive is working properly.

 If the Safe mode boot fails or gets stuck, then reset both NVRAM and SMC settings as mentioned earlier.

 RAM with incorrect specifications can also result in a gray screen. Remove any RAM you’ve recently added and restart again.

 Restart your Mac in Recovery mode by holding Cmd + R as you boot. Then, repair your startup drive with the disk repair utility.

 Gray Screen With No Disk Icon

 If the gray screen has a folder with a flashing question mark, then it means your Mac can’t find a valid startup volume. But when it shows a “Do Not Enter” symbol, it means that your macOS installation is corrupted.

 To fix this:

 Sometimes your Mac forgets the startup volume and momentarily shows a flashing question mark. To solve this problem, go to the Startup Disk pane in System Preferences and re-select your startup volume.

 Boot your Mac in Recovery mode. In the Apple menu, check whether you can see the startup volume or not. If you can’t, the startup disk most likely has problems. Run the disk repair utility to fix the problem.

 Reinstall macOS on your startup disk.

 3. Repeated Kernel Panics

Occasionally, you may find that your Mac restarts spontaneously. When the screen comes back on, you’ll see a warning message, as shown above. This is known as a kernel panic—a type of low-level, system-wide crash that your macOS can’t recover from. It’s a bit like a blue screen of death on Windows.

 The presence of this warning sign is what distinguishes kernel panics from app-related crashes and restarts. A single kernel panic is usually not a problem. But when it happens often, something more serious may be afoot. Since kernel panic tends to occur randomly, they’re often difficult to reproduce.

 Causes and Solutions for Kernel Panics

 Your Mac needs enough storage space to carry out day-to-day activities. A kernel panic could be a sign that you’re running critically low on disk space. See how to free up space on your Mac to regain some.

 macOS is picky about the quality of RAM. If your RAM does not match the specifications or is even slightly defective, kernel panics or crashes can happen. Do a detailed Apple Hardware Test or Diagnostics to check your RAM.

 Faulty or outdated peripherals can also result in kernel panics. Detach all peripherals except the power adapter, then reboot and check if it’s working properly. One by one, plug your external devices back in after each restart. If you find the problematic hardware, check for driver updates or contact the manufacturer.

 Most of the time, macOS system updates include firmware updates. However, if you have an older Mac, you may be able to install firmware updates manually. Check Apple’s support page for EFI and SMC firmware updates, but know that it’s been archived by Apple. Also, check for updates for third-party apps. Bugs in apps may lead to a low-level system crash.

 Safe mode can help isolate many issues that result in kernel panics. If your Mac boots in Safe mode, look for third-party libraries and system extensions in the Library folder.

 4. Mac’s Fan Runs Excessively

Your Mac contains some vital sensors that respond to temperature changes inside your system. These turn on your fan and provide necessary airflow to cool critical components. They’re important because overheating can lead to physical damage.

 Sometimes an app requires a great deal of processing power to complete its task. In such cases, your fans will run heavily and make noise. This is perfectly normal, and you shouldn’t worry about it. But when your fan runs constantly even though it isn’t experiencing heavy usage, that’s a red flag.

 Here are some places to check when your fans are going crazy:

 Your Mac has vents that let fans bring in cold air and expel hot air. Make sure they aren’t blocked. Avoid using your Mac in places like the couch, a pillow, in bed, or on your lap for extended periods of time.

 Dust can accumulate on the vents, fan, and the surface of any parts. When dust blocks the airflow, the heat that does escape has nowhere to go. Periodic cleaning with a cloth or compressed air will help remove this dust.

 A faulty temperature sensor, or an erroneous System Management Controller (SMC) setting, could cause your Mac to run the fan all the time. Reset your SMC using the guide linked earlier to fix the problem.

 An app might be consuming too much CPU. Open Activity Monitor and visit the CPU tab. Check for any updates for apps using too much CPU, or report the issue to the developer.

 5. Mac Keeps Turning Itself Off

 You’re working on your Mac, and then it suddenly turns off for no obvious reason. MacBooks can randomly power off despite having an internal battery. This unpredictable issue results in the loss of unsaved work. Worse, it might damage your hardware and macOS.

 When your Mac shuts off randomly, here’s what to do:

 Check to make sure that the power cord is firmly seated on both ends. Next, review the cables for any damage. Try a spare cable if you have any doubts. And if you’re using a UPS, make sure that it’s working properly and you can power your Mac from the battery.

 Go to Energy Saver settings in System Preferences and click the Schedule button to verify that your Mac is not scheduled to shut down automatically.

 The SMC chip is responsible for power management and thermal fan controls. When it goes haywire, the fan starts running fast in response to heat and shuts down your Mac. Thus, this is another issue that resetting the SMC in your Mac can fix.

 If your fan is not working, then your Mac can shut down due to overheating. To check the health of your Mac’s fan, try apps like Macs Fan Control and TG Pro.

 Start your Mac in Safe mode and run it for a while to see if the problem happens there.

 Regular Mac Backups Keep Data Safe From Trouble

Macs can have problems just like other computers. Defective components, the age of your Mac, and user-based errors can cause a variety of issues. You’ll notice from the tips here that there’s not a single clearly defined solution for these problems. As a result, these warning signs require thought and care.

 That’s where the importance of backups comes in. When you back up your data regularly, you won’t lose your important information if your Mac suddenly stops working. See our guide to backing up your Mac with Time Machine to protect your files.

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