I'm using the Mini to VGA adaptor for a projector at work and it will not push the video. I've tried several resolutions and refresh rates but not change. Other people using laptop with built in VGA don't seem to have any issues getting it on the projector but I cant seem to make it work. It does work when I plug it into a VGA monitor so I'm pretty sure the adaptor is ok. I also did that Apple mini to VGA firmware update but it was already up to date.