Harddriveprobs Said:
"How long does it take to “verify” the disk?: Got the flashing folder with question mark. Apple info on Google says restart in recovery mode and check for disk issues. Following all the steps I am now trying to “verify disk”, but it’s not clear on time required to complete the task. Any ideas?"
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Fixing This:
The Question Mark will stay there eternally, until it is fixed.
Three Things...
I. Go here: If your Mac Starts Up to a Question Mark - 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 more.