I have two mac book(Ram-2x1GB)...can i upgrade 3gb memory for both mac book by buy the one 4gb module (4GB 1066MHz DDR3 (PC3-8500) - 2x2GB SO-DIMMs).

Apple Memory Module 4GB 1066MHz DDR3 (PC3-8500) - 2x2GB SO-DIMMs

Apple Memory Module 4GB 1066MHz DDR3 (PC3-8500) - 2x2GB SO-DIMMs

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