Usually i’m used to this tearing effect in all other Operation Systems like Linux and Windows. It is possible to enable vertical synchronisation all over the desktop environment but that slows down the whole system and results synchronisation problems in video playback.
But in Mac OS X i noticed today something wierd. The tearing effect was gone. Totally smooth movement of the windows and the video playback was correct too. I don’t know how they do it, but it works.
I’ll never get behind this apple magic i guess 😀