Why is my MacBook Air having the question mark is this by

Chukwubaby Said:

"Why is my MacBook Air having the question mark is this by: What do I do with the screen dialog?"

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Go here: If your Mac Starts Up to a Question Mark - Apple Support

Mount the Drive:

Boot into Recovery Mode (Hold Down: [Command + R] upon boot). Then, using Disk Utility, see if the Hard Drive, along with the boot disk are seen. If they are, 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.