I know this is not an easy problem to crack, so I will break it down:
I suppose the easiest way to ask, is Audio content Playback on one mac, Video content Playback on another.
External hardware needed?
Is MIDI Time clock an option in this scenario?
More depth:
My DAW software can slave to SMPTE, or MIDI Clock, on MAC"A"
My video playback ideally is a Quicktime Video, on MAC "B"
In my perfect dream world, the Quicktime video follows the audio content, so if I jump to a marker in the audio sequence, the video knows exactly where it should playback, regardless to what tempo the audio is set to.
Gear: MOTU 828 Firewire Audio card