Flashing question mark on screen

Learn more about these key combinations.

Start up from macOS Recovery

To start up from macOS Recovery, turn on your Mac and immediately press and hold one of the following combinations on your keyboard. Release the keys when you see an Apple logo, spinning globe, or other startup screen.

• Command (⌘)-R

Reinstall the latest macOS that was installed on your Mac (recommended).

• Option-⌘-R

Upgrade to the latest macOS that is compatible with your Mac.

• Shift-Option-⌘-R

Reinstall the macOS that came with your Mac, or the closest version still available.

• i had this flashing question mark and reinstalled MacOS using these instructions:  macOS Recovery.

I used Command (⌘)-R

If a flashing question mark appears when you start your Mac - Apple Support

Hopefully you meant command R.

Maybe someone else will have an idea.

The one that says "cmd". Next to the Space Bar. Unless you have a non-US Apple keyboard.

If you have a Windows PC keyboard, it would be the "Windows" key.

Command (⌘)-R