VoiceOver: Using VoiceOver on a Mac without a display attached may cause applications to be slow or unresponsive
Products Affected
Mac OS X 10.5, Mac OS X 10.6, VoiceOver
Symptoms
When using VoiceOver on a Mac that does not have a built-in video display (such as a Mac Mini or Mac Pro), some applications may become slow or unresponsive when no display is connected.
Resolution
Connect a DVI, Mini-DVI, or Mini DisplayPort adapter (depending on the video output your Mac uses) to the computer--the adapter doesn't need to be connected to a display, just to your Mac.
Twitter
Facebook