When Apple introduced the Power Mac G5 in June 2003, it made a big deal of the G5 being a 64-bit CPU. It even mentioned that on the box. But what does that mean to Mac users?
2009 – Apple is billing Mac OS X 10.6 Snow Leopard as its first fully 64-bit operating system, but this isn’t the first time the Mac OS has changed it bitness.
Apple has been promoting three key advantages of Mac OS X 10.6 Snow Leopard that are hardware dependent: Grand Central Dispatch (GCD) OpenCL 64-bit operation