* Attention Mac Mini Customers using dual monitors only. There is an unresolved issue with using both the mini-DVI and mini display port outputs simultaneously. Specifically – when the mini-DVI cable is disconnected from the Mac mini, this causes the mini display port to not function – often causing the display to show an “unsupported format” error. This appears to be an ongoing issue with multiple generations of Mac minis (models with mini-DVI and mini display port) and also appears to be happening with a variety of manufactures display adapters for macs, not just Monoprice adapters.
The solution – (Again, for dual monitoring Mac mini users only) Use the mini-DVI output for your main display, and the mini display port for the secondary display. That way - disconnecting the second display (mini display port) will not affect the output on the main display (mini-DVI). This will not be an issue if you are using two monitors - and are not disconnecting your mini-DVI adapter.