Perhaps I was a
bit hasty in my last response. What exactly are you looking for? The means to control your iMac from the
desk? Or the means to control the
projector and sound cues from your iMac?
First of all, I wouldn't try to run both video and sound from the same computer (unless you are using the same piece of software to run both).
If you are asking about the former,
Midi or
Midi Show Control, like I said before, would be your best bet. You could also use something like
Rosco's Keystroke if you have it.
If you are asking the latter, Derek's suggestion of
QLab is probably number one sound
cue software. I highly suggest it. I am using it on my
current show. Very reliable. As for projection, you can get away with something cheap like
PowerPoint (or similar) if you are doing stills, but if you are using video, you should probably get some sort of
media server. Something along the lines of Arkaos, Whatchout, or Hippotizer,
etc.
-Tim