Have a flashing question mark

Jpgrean Said:

"Have a flashing question mark: Have a flashing question mark, computer won’t start"

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Troubleshooting a Mac with a Question Mark:

Three Things...

1. Go here: If a Flashing Question Mark Appears when you Start your Mac - Apple Support

II. Mount the Drive:

Boot into Recovery Mode (Hold Down: [Command + R] upon boot). Then, using Disk Utility, see if the Hard Drive is seem. If it is, then see if you need to click the “Mount’ button for it. Try rebooting once more. If of no success, then click unmount button, and then the mount button. Try rebooting once more.

III. If Neither of the Above Works...

Reinstall the macOS:

Go Here: How to reinstall macOS from macOS Recovery - Apple Support. Important: Be certain to create a backup of your Mac prior to all of this. That way, you can have something to restore from the Mac from, should anything go wrong with the reinstall. Once reinstalled, try this once mor

Hi,

Resetting NVRAM could solve the issue,

Reset NVRAM or PRAM on your Mac - Apple Support

If it doesn't help, start up in Recovery Mode then use First Aid of DiskUtility to check your boot disk.

How to reinstall macOS - Apple Support

Take a look at this article. Might be helpful.

If your Mac starts up to a question mark - Apple Support

please see If your Mac doesn't start up all the way - Apple Support

or more specifically if your Mac starts up to a question mark - Apple Support