A report posted on Macrumors forum brings some information about the RAM management of the new MacBook Pro. The user indicates to have installed 2 DDR3 RAM modules of 4 GB each in a new MacBook Pro. After the installation, the notebook becomes unstable, and the system does not manage more than 4 GB of RAM.
However, according to the technical specifications, the hardware should support 8 GB of RAM without any problem, so it might indicate that Mac OS X is not set to manage more than 4 GB RAM for the moment. A similar problem was spotted with Mac Pro, and it disappeared from one day to another after an update. In addition, the same memory bug is present with the previous Penryn-MacBook Pro model if you install 2 DDR2 modules of 4 GB each.
We currently think that Apple did not implement support for 4GB RAM module as so far such modules were either not available or so highly priced that no one
