Imac Will Not Restart

Posted onby

First, you have to restart in Recovery Just restart your Mac and when the computer powers back on, press and hold the command + R keys until the Apple logo is visible. When the option comes, click on Disk Utility. Now, you have to select the startup disk (the disk where Mac is installed). Yesterday, I was working in Autodesk Maya, and suddenly whole screen went black, so I did a hardware reset, by holding down the power button. After that the iMac doesn't boot properly. It does the chime sound, then the apple logo with indicator and then just goes to a white screen. The keyboard doesn't work as caps-lock light wont come on.

  • So, when an iMac or MacBook Pro stuck on the Apple logo during booting, try to reset these settings. Note: NVRAM is available on M1 Mac, but it is configured to run test on startup and reset the NVRAM automatically if needed.
  • Worst case, of course, is a restart of your Mac. For example, 'Frozen: How to Force the Restart of a Mac.' Make sure the Finder is the frontmost app. Hold down the SHIFT key.

Circle with a line through it

Learn what to do if your Mac starts up to a circle with a line through it (prohibitory symbol).

Question mark

Learn what to do if your Mac starts up to a question mark.

Options with a gear icon

Learn what to do if your Mac starts up to Options with a gear icon.

Blank (empty) screen

Learn what to do if your Mac starts up to a blank screen, such as an empty gray, black, or blue screen.

Apple logo

Learn what to do if your Mac starts up to an Apple logo or progress bar.

Globe with alert symbol

A globe with an exclamation point means that your Mac tried to start up from macOS Recovery over the Internet, but couldn't. Learn what to do if your Mac can't start up from macOS Recovery.

Lock icon

After

If your Mac is using a firmware password, the lock icon appears when you try to start up from another disk or volume, such as an external drive or macOS Recovery. Enter the firmware password to continue.

System lock PIN code

Your Mac asks for a PIN code when it has been remotely locked using Find My. Enter the four-digit or six-digit passcode to continue.

Login window

At the login window, enter your user account password to log in to your Mac. If FileVault is turned on, this also unlocks your disk. You might see a default desktop picture in the background, which might change to your chosen desktop picture when you select your account.

Thunderbolt, USB, or FireWire symbol

A large Thunderbolt , USB , or FireWire symbol against a dark background means that your Mac is in target disk mode.

Learn more

  • Learn what to do if your Mac displays a message that it restarted because of a problem.
  • When starting up from Windows using Boot Camp, your Mac doesn't show an Apple logo or the other macOS screens in this article.

Before we get our hands dirty, here’s a word of warning. If you’re wondering how to reboot a MacBook Pro, bear in mind it’s the last resort when all other methods to unfreeze your Mac had failed. Don’t try it too often, as it may harm your system. No question, your Mac can handle rapid power losses, and your hardware most likely won’t be hurt. What’s at risk, though, is your data because each time you force reboot a Mac, it affects the consistency of the file system. Now that you’ve been warned let’s go.

Symptoms your frozen Mac needs a force restart

  • Applications are not responding
  • The pointer is not responsive
  • Loud fan noise
  • The screen goes black
  • Mac unable to restart

Can you move the cursor? If yes, try this

Before you force restart a Mac, it’s always recommended to first try a software solution.

  • Go to the Apple menu
  • Choose Restart
  • Click Restart in the menu that appears

Two ways to force restart a Mac

The simplest method: hold down the Power button till your Mac shuts down. Press the button again to restart it.

If your Mac hangs for good and the pointer is inactive:

  • Hold down Control-Command while pressing the Power button.

This is an alternative key combination to force restart a Mac. By the way, if you are on an iMac, the Power button is found on the back of your Mac. Voila!

Is Shut Down any different from Restart?

The difference between Shut Down and Restart is quite self-explanatory. When you perform a restart, your Mac will turn on again, loading its previously active apps. As for shut down, your Mac won’t start until you press the Power button again. Interestingly, all new Macs have an automatic reboot feature built-in. So even if you sit and do nothing, your frozen Mac would eventually reboot by itself, though it takes a bit of patience.

How to force shut down a frozen Mac

If you need to force shut down a MacBook Pro or MacBook Air, all you need is again to press a Power button on your Mac’s keyboard.

  1. Press and hold the Power button for 2 seconds.
  2. Choose Restart, Sleep, or Shut Down in the menu that appears.

If you don’t want to reload the baggage of your previously opened apps, tick off “Reopen windows when logging back in.” We recommend you deselect this option when your Mac is slow to lighten the weight on your RAM.

If your Mac won’t shut down:

  1. Press and hold the Power button.
  2. Hold the button until the Mac shuts down.

Needless to say that when you force restart a Mac, all your unsaved projects may be lost. It’s unfair, we know.

Why does my Mac keep freezing?

The obvious explanation is your Mac lacks memory. Or, to put it another way, there are too many active processes running on your Mac. First off, go to Activity Monitor to check your memory usage.

  1. Go to Applications > Utilities > Activity Monitor
  2. Click the Memory tab.

Imac Will Not Shutdown

Now, look into how heavily your Memory is loaded. Quit apps that eat up too much memory for no reason. While this may work as a temporary solution, it doesn’t stop your Mac from freezing up again. You can either force reboot your Mac each time or opt for a radical solution. Below are a few more ideas you can try.

More ways to fix a frozen Mac

Restart your Mac in the Diagnostics mode

Imac Will Not Start Up

Shut down your Mac and reboot while pressing the D key. Within the menu that appears, launch the Apple Diagnostics tool. This will check your Mac’s drive for errors. From then, follow the prompts to finish the diagnostics.

Clean up your Mac

Remove old unused apps, system junk, and pervasive browser extensions. For this purpose, try running the CleanMyMac X application on your Mac.

It’s quite effective in removing all junk from your Mac and has several helpful utilities, like RAM free up or app uninstaller. Download it for free here.

Reinstall your macOS

This is the most radical of all methods; that’s why it’s so effective.

Imac Will Not Restart

  • Check out how to clean install macOS Sierra
  • Instructions for macOS High Sierra
  • How to clean install macOS Mojave
  • How to clean install macOS Catalina
  • How to clean install macOS Big Sur

Imac Will Not Boot Up

Hope this guide has helped you. Before you force shut down this article, feel free to share it using the social buttons below. Cheers!