Newer Technology (NewerTech) today announced that all NewerTech MAXPower G4/7448 Single and Dual Processor Upgrades for Power Macintosh G4 AGP Graphics/Sawtooth, Gigabit Ethernet, Digital/Audio, and Quicksilver model computers have been thoroughly tested and verified for full compatibility with Mac OS X Leopard operating system. NewerTech MAXPower G4/7448 Processor Upgrades are available in four configurations: 1.8GHz single, 2.0GHz single, 1.7-1.73GHz DUAL, and 1.8GHz DUAL, priced starting at US$349.