Mary Jo Foley couldn’t have done any better at igniting a flame war if she tried with this posting titled “Leopard Looks Like… Vista“. Number 4 is just plain wrong, and is probably worth explaining to any worried Mac owners out there. Unlike the PC’s, Mac’s have had 64-bit processors for a number of years with the G5 and G4 processors – so Leopard isn’t cutting out owners of those Mac’s. It is also worth bearing in mind that Tiger is partially 64-bit already – Apple has taken a phased approach with a single version – none of this 32-bit/64-bit version incompatibility confusion that people encounter on Windows. The current version of the OS, Tiger is 64-bit in parts anyway (check out this Apple explanation for more detail) – Leopard is merely the next phase in the process. The 64-bit business is purely for the techies, as a Mac end user it has no bearing.