In our classroom, we had an iMac (7,1) hooked up to a inFocus projector. The old iMac ran 10.4.11. I'm trying now to hook it up to a new iMac (11,3) and can't get the inFocus to recognize the new mac. The projector seemed to work fine with a MacBook running 10.6 so I'm baffled as to why it won't recognize the iMac with the same system. I've tried multiple resolutions to no avail. Anyone have any suggestions? Thanks.