is Mac compatible with AVCHD video format?

i'm looking for a videocam and trying to figure out for sure if Mac is simply not compatible with the AVCHD 60p format? or it can support AVCHD format but only at lower frame rates? i was looking at a Sony camcorder, and it said specifically that iMovie cannot support AVCHD 60p format. is this a hardware issue? is it a quicktime issue? is it an OS issue? (i'm on Snow Leopard 10.6.8 if Lion, or Mountain Lion now support AVCHD 60p format, please let me know). thanks