Mac keeps restarting over and over? Mac keeps restarting on its own? MacBook Pro keeps restarting at boot? No worry. After reading this article, you can not only know why your Mac keeps restarting (Part 1), how to fix the “Mac keeps restarting” issue (Part 2) but also how to avoid spontaneous restarts on your Mac (Part 3). If you have encountered the similar problem on your iPhone X, iPhone 8 or iPhone 8 Plus in iOS 11, go to the article about how to fix iPhone X/8/8 Plus keeps restarting to learn how to solve the problem.
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If you suspect one of your computer accessories to be faulty, you just need to remove everything connected to Macbook, then restart. Disconnect your mouse, keyboard, camera, speakers, external drives, and USB. If your Mac works smoothly without these accessories, then one of them might be the culprit. “your computer restarted because of a problem press a key or wait a few seconds” loop on Catalina Macbook Pro. Most of our user base has seen this issue on OS Catalina using a Macbook Pro. Though this can occur more rarely on Mac Os Mojave. This leads us to believe that older laptops are more susceptible to this issue.
Part 1: Why Mac keeps restarting
In most of the cases, the main contributor to the 'Mac/MacBook Pro keeps restarting' issue is 'kernel panic'. The 'kernel' refers to the operating system of your Mac. Why does kernel panic lead to abnormal restarts? That's because the operating system has detected an issue on your Mac and the restart must be performed to fix the issue, which is usually caused by the faulty software or a problematic hardware. How to decide whether kernel panic is occurring? Generally, a message will pop up on your Mac screen showing you 'Your Computer restarted because of a problem'. If you are in the very situation, don't hesitate to get possible solutions in Part 2.
Part 2: How to fix Mac/MacBook Pro Keeps Restarting
If your Mac or MacBook Pro keeps restarting over and over, you first need to know where the problem is. Is the software installed on your Mac the cause of the issue or the hardware on your Mac to connected to your Mac the cause of the issue? If the kernel panic is related to hardware, follow the first two tips to learn what to do. While if the problem is related to software installed on your Mac, follow the last two tips instead. (Other solutions to common Mac/iDevice problems are also covered, go to iOS & Mac Topics to find what you need if you want.)
For hardware related kernel panic:
The kernel panic could be caused by a peripheral device or a combination of peripheral devices that has been connected to your Mac or the internal RAM or third-party hardware. Thus hardware troubleshooting is inevitable to solve the 'Mac keeps restarting' issue.
Tip 1: Check the peripheral devices connected to your Mac
Step 1: Shut down your Mac and disconnect all the peripheral devices. (Keep the display, keyboard, and mouse that are from App connected only. )
Step 2: Start your Mac and use it as usual.
Step 3: Troubleshoot hardware.
- If your Mac works properly after you use it for a period of time and no kernel panic occurs, you must know that there is something wrong with the peripheral device that previously connected to your Mac. To check which peripheral device is the 'culprit', connect one peripheral device to your Mac at a time and test. If a single peripheral device doesn't cause the 'Mac keeps restarting' issue, you can try to connect two or more peripheral devices to your Mac and test.
- While if a kernel panic occurs later, it must be something wrong with the internal RAM or third-party hardware. If so, follow tip 2 to check the hardware.
Tip 2: Check the internal RAM and third-party hardware on your Mac
Macbook Pro Computer Restarted Because Of A Problem Update
Step 1: Shut down your Mac.
Step 2: Remove the third-party RAM and internal hardware from your Mac. Reseat your Apple RAM if you get one. If not, reseat the RAM you have instead.
Step 3: Start your Mac and use it as usual.
Step 4: Do troubleshooting.
- If the 'Mac keeps restarting' problem doesn't happen after you use your Mac for a period of time, you know that the third-party RAM or third-party internal hardware should to replaced to avoid the kernel panic.
- If your Mac keeps restarting again, you need to go to the Apple Store nearby with your Mac to seek help from Apple.
For software related kernel panic:
Tip 3: Reinstall operating system on your Mac
Step 1: Use macOS Recovery to reinstall macOS.
- Hold and press the key combination (Command + R) on your Mac keyboard immediately after you press the power button to turn on your Mac until you see the Apple logo or a spinning globe.
- Choose Reinstall macOS in the window and click Continue.
Step 2: If you have reinstalled macOS successfully, go to App Store >Updates to install all the updates on your Mac.
Step 3: Before you reinstall the third-party software, download and install all the third-party software updates.
Step 4: Do troubleshooting.
- If the kernel panic doesn't occur, you have solved the issue successfully.
- While if your Mac keeps restarting again, follow tip 4 introduced below.
Tip 4: Fix 'Mac keeps restarting' issue related to software
Step 1: Use macOS Recovery to start your Mac. (Refer to step 1 in Tip 3.)
Step 2: Use Disk Utility to back up your disk image to an external drive with enough free space.
Step 3: Wipe the internal drive via Disk Utility.
Step 4: Install OS X and start your Mac from the internal drive.
Step 5: Go to App Store >Updates to install all updates on your Mac.
Step 6: Reinstall the third-party Apps on your Mac and copy the user data from the backup you have just created.
Part 3: How to prevent Mac from restarting
Unexpected restarts of Mac could be quite annoying, Thus it's necessary to learn how to prevent the problem from happening. The most effective way to avoid kernel panic is to always update your software to the latest version. You just need to go to App Store >Updates to make it. Easy, right? Hope you won't meet the 'Mac keeps restarting' issue again. For other problems like Mac running slow, Mac stuck on the login screen, Mac won't turn on and more, you can also find the fixes in the related article.
About unexpected restarts
Rarely, your Mac might experience a software or hardware issue that requires it to restart. When it starts up again, you might see a message that your computer was restarted because of a problem.
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. Use the steps below to check the software and hardware on your Mac.
Your Computer Restarted Because Of A Problem Macbook Pro Mid 2010
Check your software
If the issue is caused by software on your Mac, one of these steps might help:
- Install all available software updates.
- If your Mac suspects that a particular app caused the restart, it might ask whether you would like to move the app to the Trash. Click Move to Trash, then contact the software developer to see if a software update is available.
- Use safe mode to try to isolate the cause of the issue.
- Reinstall macOS. If the issue continues after reinstalling macOS, check your hardware.
Check your hardware
Learn how to check your connected devices and other hardware.
Check peripheral devices first
If you don't have any devices attached to your Mac, skip to the next section.
- Shut down your Mac.
- Disconnect all peripheral devices, such as hard drives or printers. If you have a desktop Mac, make sure that only a display, keyboard, and mouse or trackpad are connected.
- Turn on your Mac.
- Use your Mac for the amount of time that it would usually take for an unexpected restart to occur.
- If an unexpected restart occurs, follow the steps to check the internal RAM and third-party hardware.
- If an unexpected restart doesn't occur, turn off the Mac and connect one peripheral device at a time until an unexpected restart occurs.
Macbook Pro Computer Restarted Because Of A Problem Video
Check RAM and third-party hardware
Certain models of Mac computers have removable memory (RAM). If you recently installed memory or a hard disk (or SSD), make sure that it's compatible and installed correctly. If possible, remove it and test with the original memory or disk.
- If you continue to experience unexpected restarts, contact Apple Support.
- If your Mac is frequently restarting unexpectedly, it's important to determine the exact steps that lead up to the issue. The next time that your Mac restarts unexpectedly, record the date and time it occurs. These questions might help you diagnose the problem:
- Was the computer starting up, shutting down, or performing a particular task when the unexpected restart happened?
- Is the computer restart random, or does it happen every time you do a certain task?
- Does the restart happen when a specific external device is connected to your Mac or to a specific port?
- Learn what to do if your Mac doesn't turn on or start up.
- Learn about the screens you see when your Mac starts up.