MBA displays the Question mark Folder on booting up
All of a sudden MBA boots displaying question mark folder. I've tried booting from a USB OS X to use disk utility but can't see the Macintosh HD of the Air to fix the disk. Safe mode doesn't seem to work. Any root-cause? Any solution?
The question mark folder usually means:
- The hard disk is failing or has failed
- Your Mac can't find a System Folder to boot from
Try starting up while holding down the Alt/Option key. That should prompt the Startup Manager window where you can select the startup disk.
If that doesn't help, refer to this Apple KB Article.