[Link: twistedmelon.com]

You need that. You need an IR flasher (eye) run from the processor to that part. You need to put a program called remotebuddy on the mac. Your then map a button in remotebuddy to the program you want to open and program that button press into the panel. With that part and remotebuddy software, any programmer worth half a darn could accomplish this. This isn't the best way to go about it though, but it will work.

There may be a way to send HTTP commands from crestron to the mac pro to start the program, but that is above my paygrade. I'm about 99% sure this is possible and would be the best way to accomplish this.