Leopard, you can tick the other 10 of the remaining 11 business days left on the October calendar because it's finally official: Mac OS 10.5 launches Friday, October 26th at 6.00pm, and may we just say friggin finally. Minimum specs: Intel, PowerPC G5, or PowerPC G4 (867MHz or faster) processor with 512MB of physical RAM. $129 for a single-user copy or $199 for a 5-user, single-residence family pack. Upgrade price? You're kidding, right... this is Apple.