I have that colorimeter and used it on my laptop, it's pretty a pretty drastic change when I calibrated my laptop. It's also easier as the software does all the changes needed, all you really do is change the brightness. You can also use it with calman if you want to calibrate you TV.
I don't want to buy Windows and I'm not using it for monitors. Only TV's.
I use BootCamp on my MacBook Pro. If you don't want to use Windows then you are probably out of luck. If you want to buy one of the major cal software packages you are definitely out of luck.
I would say come to the Dark Side but Apple IS the Dark Side now
CalMan and ChromaPure both run just fine in VMWare Fusion for my on my Mac, and inside of Windows XP. Going Boot Camp means Windows 7 at a minimum now I believe. You can find an older version of Color HCFR for Mac I believe, but it won't work with the i1Display Pro. I have VMWare Fusion only for calibration software and the occasional PC program (Paradigm Perfect Bass Kit, etc...) that reviews require, it's just the way everything is right now it seems.