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Can I upgrade the MEM to 4G(DDR2 800) in a MacBook Pro A1150? Does it support 4G MEM? Each 2G mem is working, when 4G isn’t working, I can’t open the MAC os, just black screen.

RAM Type: PC2-5300 DDR2 Min. RAM Speed: 667 MHz Details: Supports 667 MHz PC2-5300 DDR2 SDRAM. Standard RAM: 512 MB Maximum RAM: 2 GB Details: 512 MB installed as a single module. One slot free. Also see: Is the 2 GB maximum RAM capacity for the MacBook Pro a true limit? Would it support 4 GB of RAM if I installed dual 2 GB SO-DIMMs? http://everymac.com/systems/apple/macboo

Sadly, It wont work with 4g. I got 2x laptops with core Duo (macbook & macbook pro) and the max ram it will boot with is 2g. We also have 1x macbook Core 2 Duo and that one goes to 4g but none of apple’s Core Duo will run on 4g… Thanks