Flashing question markHighFlashing question mark on Mac
What this error means
A flashing question mark folder on macOS means your Mac cannot find a startup disk with a working system to boot from. This often appears right after you turn the Mac on or restart it. In many cases, the startup disk is temporarily unavailable, the wrong disk is selected, or macOS on the disk is damaged.
If your Mac shows this symbol for more than a few seconds, it is not starting normally and needs attention before you can use it.
Common causes
- 1The startup disk is not selected or was changed
- 2macOS files on the startup disk are damaged
- 3The internal drive is not being detected properly
- 4The disk has run into file system problems
- 5There is not enough disk space for macOS to start normally
How to fix it
- Shut down your Mac completely. Wait about 10 seconds, then turn it back on and see whether it starts normally.
- Disconnect any external drives. Unplug USB drives, external hard drives, and memory cards, then restart again. A removable device can sometimes distract the Mac from its normal startup disk.
- Try choosing the startup disk. If you can reach macOS Recovery, open Startup Disk and make sure your internal Mac drive is selected, then restart.
- Run disk repair. In Recovery, open Disk Utility and use First Aid on your startup disk. This can fix problems that prevent the Mac from finding or starting the system.
- Check for signs that the disk is failing. If Disk Utility does not show the internal drive, or First Aid reports repeated errors, the drive may be disconnected or failing.
- Reinstall macOS if the disk is visible but still will not start. From Recovery, choose the option to reinstall macOS. This usually keeps your files, but there is always some risk, so avoid erasing the disk unless you have a backup or a technician recommends it.
Recommended fixes
Restart your device
A restart clears temporary state that often causes transient errors.
- Save your work and close open apps.
- Restart the device from the power menu.
- Reproduce the issue to check whether it persists.
Install macOS updates
- Open System Settings > General > Software Update.
- Install any available updates.
- Restart if prompted.
Boot into Safe Mode (Mac)
Apple silicon: shut down, hold the power button until startup options appear, select your startup disk, then hold Shift and choose Continue in Safe Mode.
Intel: restart and hold Shift until the login window appears.
Run First Aid in Disk Utility (Mac)
- Open Disk Utility.
- Select your startup disk and click First Aid.
- Let it verify and repair the disk.
Contact Quickfix support
If the issue persists after trying these steps, reach out so we can help.
Visit the contact page and include your scan report code.
When to seek help
Get professional help if the flashing question mark keeps returning after restart, Disk Utility cannot see the internal drive, or First Aid fails repeatedly. You should also seek help quickly if you hear unusual clicking, the Mac is very slow before it shuts down, or you have important files and no backup. These can be signs of a failing drive that may need repair or data recovery.
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