Great, but quite a few bugs.

For the most part this is a great port by CD Projekt Red; a lot better than most other companies ports. Late 2011 Macbook Pro, with 16 GB of RAM, the game can run on high for the most part. However, its better to stick to medium or custom, as the game will sometimes crash. The next problem is that it seems as though if you do make custom settings, as soon as you exit the options menu, it will reset and youll lose all your settings. Very annoying and potentially game-breaking.
Terms of gameplay, flawless; one of the best RPGs Ive ever had the privilege to play. However, the bugs and crashing take away from the overall experience (Id give it a 3, but the gameplay is just too addictive).

LREC94 about The Witcher 2, v1.01