The fastest way to restart your Mac

To restart your Mac, click the Apple menu in the top-left corner of your screen, then select Restart from the dropdown menu. A dialog box will appear asking if you want to save any open documents. Click Restart again to confirm. Your Mac will close all applications and restart automatically—this usually takes 30 seconds to two minutes depending on how much is running.

If you need to restart right away and don't want to save your work, you can hold down the power button on your Mac for about 10 seconds until the screen goes black. This is a force restart and should only be used when your Mac is frozen or not responding, because it can cause data loss if you have unsaved files.

On newer Macs with the M1, M2, or M3 chip, the power button is usually on the keyboard or on the side of the device. On older Intel-based Macs, it's typically on the back or side of the computer. Either way, the Apple menu method works the same.

Key Takeaways

  • The normal restart method is Apple menu > Restart, which safely closes your applications and saves your work.
  • A force restart (holding the power button for 10 seconds) should only be used when your Mac is frozen or completely unresponsive.
  • A standard restart takes 30 seconds to two minutes and is safe to do whenever you need to refresh your system.
  • Always save your work before restarting unless your Mac is already frozen and won't respond to normal commands.

When to restart your Mac

Restarting your Mac clears temporary files from memory, closes background processes that may be slowing things down, and refreshes your system. If your Mac is running slowly, an process keeps crashing, or you've installed software updates, a restart often solves the problem without any other troubleshooting.

You should also restart after installing major software updates—macOS updates especially require a restart to take effect. Some applications will prompt you to restart when you first launch them after an update. If your Mac has been running for weeks without a restart, a reboot can improve performance.

What happens during a restart

When you click Restart, your Mac goes through several steps in order. First, it notifies all open applications that a restart is coming. Most applications will close automatically, though some may ask if you want to save unsaved documents. Once all applications are closed, your Mac shuts down completely.

Then your Mac powers back on, loads the operating system, and returns to the login screen (or your desktop if you don't use a login password). Any applications set to open at startup will launch automatically. The whole process is designed to be safe—your Mac won't lose data as long as you use the normal Restart command instead of a force restart.

Restarting when your Mac is frozen

If your Mac is completely frozen and won't respond to mouse clicks or keyboard commands, the Apple menu method won't work. In this case, hold down the power button for about 10 seconds until the screen goes black and the Mac shuts down. Wait a few seconds, then press the power button again to turn it back on.

This force restart will close all applications without saving your work, so you may lose unsaved documents. However, it's the correct action when your Mac is unresponsive. After the restart, check if the problem was temporary. If your Mac freezes regularly, the issue may be a specific process or a hardware problem that needs investigation.

Restarting in Safe Mode

If your Mac is having persistent problems, you can restart in Safe Mode, which loads only essential system files and disables third-party extensions. To restart in Safe Mode, hold down the Shift key when ready after you click Restart, or hold Shift while your Mac is starting up. Keep holding Shift until you see "Safe Mode" appear in the login window.

Safe Mode is useful for troubleshooting because it helps you figure out whether a problem is caused by a third-party process or by macOS itself. If your Mac runs normally in Safe Mode but has problems in regular mode, an process or extension you've installed is likely the cause. You can then uninstall that process and restart normally.

Restarting and installing updates

macOS updates often require a restart to complete the installation. When an update is ready, you'll see a notification asking you to restart. You can delay the restart by clicking "Remind Me Later," but the update won't be fully installed until you restart. If you have important work open, save it first, then restart at a convenient time.

Some updates are small and restart quickly. Others, especially major version updates, can take 15 to 30 minutes or longer. Don't turn off your Mac or unplug it during an update restart—let it complete fully. If your Mac restarts multiple times during an update, that's normal. When the process is done, you'll be back at your login screen or desktop.

Frequently Asked Questions

How long does a Mac restart take?

A normal restart usually takes 30 seconds to two minutes. If you've just installed a major macOS update, it can take 15 to 30 minutes or longer. The time depends on how much software you have installed and how much data your Mac needs to load.

Will I lose my work if I restart?

No, as long as you use the normal Restart command from the Apple menu. Your Mac will ask you to save unsaved documents before it closes each process. A force restart (holding the power button) can cause data loss, so only use that method when your Mac is frozen.

What's the difference between restart and shut down?

Restart powers your Mac completely off and then back on. Shut Down powers it off but doesn't turn it back on. Both close your applications and clear memory. Restart is better for troubleshooting because it fully refreshes your system, while Shut Down is better if you're done working for the day.

Can I restart my Mac remotely?

Yes, if you have another Mac or an iPhone, you can use Apple Remote Desktop or Screen Sharing to restart your Mac from a distance. You can also set up your Mac to restart on a schedule using System Settings > General > Restart, though this requires administrator access.

What should I do if my Mac won't restart?

If the Restart command doesn't work, try a force restart by holding the power button for 10 seconds. If that doesn't work either, your Mac may have a hardware problem. Try unplugging it for 30 seconds, then plugging it back in and pressing the power button. If it still won't start, contact Apple Support or visit an Apple Store.