how many GB memory can i install on my MacBook OS X 10.7.4 2,26 GHz Intel Core 2 Duo ? now it has 2GB (2x 1) and i have got 8GB (2x 4) which i've got together with the used macbook. i think i've read (somewhere ? mac support ?) that this model supports only max. 4 GB (2x 2) ? thanks for sharing !