I've always been a PC guy. I actually really love Windows 7. Recently two of my good friends both bought Macs and I think I'm about to go out and snag one too. I think I will use both. I just want the Mac because it edits videos so much better. I have a brand new PC with the newest chipset and everything and it still doesn't edit videos in Sony Vegas as well a Mac does in iMovie...

I know this has nothing to do with the original question of file types on a Mac but I thought I'd share my input. The friends that I know that use Macs have never told me of a problem running any software on their comps. Besides, I'll always keep a PC as well because I think there's use for both...

Matt