Preview at WWDC likely in June, followed by September launch.
Retina MacBook Pro Arriving with Up to 16 GB RAM and 768 GB SSD
9to5Mac has now published specs on the Retina-display 15-inch MacBook Pro models that are apparently arriving alongside updated versions of the existing form factor. Notably, the new machines include options ranging up to 16 GB of RAM and 768 GB of solid-state storage.
MC975LL/A – MBP 15.4/2.3/8GB/256GB FLASH-USAExact pricing has not yet been confirmed, but the high-end model is said to be exceeding the equivalent of $4000 in some countries.
MC976LL/A – MBP 15.4/2.6/8GB/512GB FLASH-USA
MD831LL/A – MBP 15.4/2.7/16GB/768GB FLASH-USA