I can't help you with the mac software but I can give you a ton of gotchas to avoid. First off, if you're intent on doing an automated booth, use a BIG screen and have it hard-mounted. Drunks have a very hard time operating a booth, that's why we went to a technician-based booth. Next, if you are bent on a closed booth, do not try to do it with pipe and drape only. It must be a very solid structure. Drunks will grab the curtains and bang into it. It needs to be heavy and secure and it will present hauling challenges. This is why we went to an open air format. Also, keep in mind that if you do the closed booth you will be up against the fact that you can only do 1-4 people in a shot. We regularly have groups of 10, 12 or 15 and it's part of the reason they like what we're doing. Double-check your DSLR on the external power supply. My Canon powershots will run off external power but they still require a battery for startup. Make sure you pound on the thing to work the bugs out ahead of time. On the printer, I can' recommend the DNP highly enough. It has a friggin huge paper drum and lasts for 4-6 events before we have to change paper/ribbon. One more thing, make sure you spend time studying the paper change routine. Doing it the first time at a party, in the darkness and with impatient drunks waiting on you is the wrong time to learn. Make sure you have some kind of ambient light for your photobooth area. Often times, the venues will stick your booth off in a dark corner and it can be difficult to navigate without another light. And as for booth lighting, use a flash. Some guys will try the always-on thing but it just didn't work well in my book. I use the camera's on board flash with a diffusor in front of it and the shots come out looking fantastic. Hope this helps.
