No problems yet with Mac OS X Panther and our original Mimio for mac (apparently the software works with all USB Mimio devices, except the flipchart). Seems to have all of the features of the windows software. Great hardware with software that does what it says. Could use some extra brushing up in terms of making the software more elegant and Mac-like. Minus one star for not working in the background (as soon as the capture bar registers any new input, Mimio switches to the foreground).