jlighthall Welcome to the boards
It sounds like it operates like a garage door opener. -:) You could use a Universal Module set to momentary operation. I do this with both my garage door openers. Someone else with Mac experience will have to chime in on the software setup :'
(http://www.bdshost.com/X10/lpup.gif)---(http://www.bdshost.com/X10/lpup.gif)---(http://www.bdshost.com/X10/lpup.gif)---(http://www.bdshost.com/X10/lpup.gif)---(http://www.bdshost.com/X10/lpup.gif)----KDR