Just got a Mac intel Core Duo laptop for clinics and travel, running Logic and DP. I am looking for a firewire audio interface that works with intel Macs. It does not have to be anything fancy, I am only demoing software and sound libraries and not doing any heavy duty recording. The cheaper the better! I already have a good setup at home.
One negative piece of advice: DON'T get an M-audio firewire interface for your Mac. I made the mistake of getting a Firewire Audiophile for my MacPro. It works OK with sampler software like Kontakt2 and Vienna Ensemble in stand-alone mode, but I have given up trying to make it work with instrument plug-ins in my DAW (DP5.12). Other people have reported similar problems with DP and Logic. The issue seems to be the M-audio drivers for Mac OS. M-audio tech support told me they were aware of the problem and were working on a new driver, but that was several months ago and nothing has come of it.
You would do best to get an audio interface from a company that really knows how to make drivers for Mac OS. According to information I have gleaned from other forums and stuff, companies like MOTU, RME and Apogee seem to have the best reputation for Mac-compatible hardware and drivers.