8GB Ram on First Generation unibody 2.53 GHz
I got two 4GB RAM modules so I tried them both in my First Gen Unibody MacBook Pro 2.53 GHz.
6GB is max for this configuration and Apple recommends 4GB.
The result was not an unstable system with crashes and such but it got really slow and “bath ball-y” in both 32 and 64K mode. All of the memory showed up in About this mac and System Profiler and all but I guess the system just tried and failed to allocate memory at addresses above 6GB.
So, the answer of wether 8GB works on this model is definitely No. 6GB seems to work just fine tho.
8GB is said to work on First Generation 2.66GHz and 2.93GHz configs and all Second Generation and later models.
