All Memory is 100% Compatible with the associated Apple Part numbers and Systems. Using 3rd party memory will in No Way void your systems warranty and is unlawful by System manufacturers to claim so. Mac Pro 2.0Ghz, 2.66GHz, 3.0Ghz Dual/Quad-Core Intel XEON (MA356D/A, MA356J/A, MA356LL/A, MA356TH/A, MA356ZP/A) PowerMac G5 DDR2 Dual 2.0Ghz, Dual 2.3Ghz, Quad 2.5Ghz ( M9590LL/A - M9591LL/A - M9592LL/A ) Power Mac G5 DDR1 Dual 1.8GHz, 2.0GHz, 2.3GHz, 2.5Ghz, 2.7GHz Power Mac G5 DDR1 Single 1.6GHz,1.8GHz ( M9555LL/A, M9020LL/A ) Power Mac G4 1.25GHz / 1.42GHz ( M8840LL/A - M9145LL/A - M8841LL/A ) iMac Intel Core Duo ( MA199LL/A - MA200LL/A ) iMac G5 ( MA063LL/A - MA064LL/A) MacBook/MacBook Pro ( MA092LL/A - MA601LL/A - MA600LL/A ) iBook G4 ( M9846LL/A - M9848LLA ) xServe G5 Dual 2.0GHz and 2.3GHz ( Z0BH - M9742LL/A - M9745LL/A - M9743LL/A ) Xserve Dual-Core Quad Xeon (MA409J/A, MA409LL/A) PowerBook G4 DDR2 15", 17" (M9969LL/A, M9970LL/A) PowerBook G4 DDR1 12", 15", and 17" (M8793LL/A, M9110LL/A, M9462J/A, M9462LL/A, M9689LL/A)