OS X Lion: If a flashing question mark appears
This article has been archived and is no longer updated by Apple.
A flashing question mark at startup means your computer is having trouble locating the system software.
- If the computer starts up after a brief delay, try reselecting your startup volume. Choose Apple menu > System Preferences. Click Startup Disk and select the desired startup volume.
- If your computer does not start up, see this article:
Apple Support article: A flashing question mark appears when you start your Mac
Last Modified: Oct 31, 2013