What to do with flashing ?

Dragon1705 Said:

"how to restore Mac os with a flashing ?"

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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

Dragon1705 wrote:

how to restore Mac os with a flashing ?

Follow these instructions:

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

Click here and follow the instructions. If the computer originally shipped with Mac OS X 10.6.8 or earlier, instead of step 8, insert a compatible Mac OS X install DVD or plug in its original thumbdrive, restart with the Option key held down, use the Disk Utility to erase the internal drive, and install a fresh OS.

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