I have tried 3 times to upgrade the ram in my MacBook2,1 Intel Core Duo 2.16GHz. w/OS x 10.6.4 It currently has 2- 512MB 2Rx16 PC2-5300S-12 by hynix I am currently trying to put in 2- 1GB 2Rx16 PC2-5300S-12 by hynix. When I make the upgrade all I get is a black screen. I have tried 2 other times to upgrade the ram with other brands and got the same result. That is why I matched the ramby Drag N Fly - Feature Requests