Apple Memory Module 8GB 1066MHz DDR3 (PC3-8500) - 2x4GB SO-DIMMs 8GB DDR3 PC3-8500 1066MHz Kit of TWO 4GB modules 8GB Upgrade Compatible with Apple iMac, MacBook, MacBook Pro and Mac mini systems Memory comes in standard, anti-static packaging. Please verify the specifications of your Mac before ordering to avoid any conflicts.