Use this cable adapter to connect your Mac to an external monitor with VGA input. Plug the Mini-DVI end into your Mac, and connect the VGA connector to a VGA (male to male) cable, then plug the cable into your monitor"s VGA input jack. Compatible models: 12-inch PowerBook G4, Intel-based iMac, the MacBook Intel-based laptop, the Intel-based Xserve, and the 2009 Mac Mini. Helpful Notes: This device is intended to function more as an adapter than as a cable, meaning its short length WILL NOT reach from your Mac to the monitor. It will need to be used with a VGA cable (sold separately). In addition, this adapter works only with Mini-DVI ports, not with Micro-DVI or Mini Display Ports. To quickly check what port you have: this adapter has a U-shaped connector that will match the U-shape found on Mini-DVI ports. Highest resolution supported: 1920x1200 @60Hz.