If your Mac starts up to an Apple logo or progress bar

Your Mac will display an Apple logo when it finds your built-in or external startup disk. As the startup process continues, you should see a progress bar with or without the Apple logo. This screen may alternate with a blank screen several times.

Apple logo with progress bar

If you're installing a macOS update or upgrade

When you're updating or upgrading macOS, the Apple logo or progress bar may persist for much longer than usual. As the installation process continues, the progress bar may move slowly and pause for long periods. Apple recommends starting the installation in the evening so it can be completed overnight, if needed.

If your Mac is stuck on this screen or keeps restarting

If the startup process never progresses beyond an Apple logo or progress bar:

  1. Press and hold the power button on your Mac for up to 10 seconds until your Mac turns off.
    Every Mac has a power button. On laptops that have Touch ID, press and hold Touch ID.
  2. Turn your Mac back on. 
  3. If the issue persists, press and hold the power button until your Mac turns off. Then unplug all non-essential accessories from your Mac, including printers, drives and USB hubs. There may be an issue with one or more of these devices or their cables. 
  4. Turn your Mac back on.
  5. If the issue persists, press and hold the power button again until your Mac turns off. 
  6. Repair your startup disk as described in How to repair a Mac disk with Disk Utility.
  7. If the issue persists, reinstall macOS from macOS Recovery.

If you need help, contact Apple Support.

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