this drive is pointed squarely at gamers. most gamers are not mac users for obvious reasons.
The people at WD probably don't even know that the Mac Pro doesn't have interface or power cables for internal SATA drives...
it is a bummer, though.
That would make a heck of a boot drive.
to clear up some confusion for the masses:
it is a 2.5" drive, but it is not intended for laptop applications...it is 2.5"-sized platters for various manufacturing reasons, but it is NOT a laptop drive. the heat fins may be removable, but they aren't really optional. Also, the drive is 15mm tall, not the usual 9mm found in most 2.5" laptops...in fact there aren't going to be a lot of laptops that could physically even fit the drive inside. It WOULD make a great eSATA external drive, though! Too bad it's only 300gb.
they basically skipped a generation with the raptor...if they had been keeping up with regular drives, the top-end raptor should be down to about 50-70 cents per GB...at this speed, size, and price, this will be hard-pressed to beat out SSD drives in a year or so. I would expect the NEXT Raptor to be the last one unless there is some major innovation in the next year where spinning drives are concerned...