Hello,
We have updated Original Sin to beta version 1.1.59.
The biggest change is that we now support Mac computers. It's not a port, it's a native thing!
We have also changed the way you now learn Skills.
Another one is the way the enemy USES skills! So now the enemy will be a lot more picky in what spell or skill to use when. They react to what you're doing. They're countering you. Some enemies even have potions and scrolls in their pockets. And they're not afraid to use 'em! Looking forward to your feedback, not only about combat of course.
But that's not all of course. There were over 300 changes and fixes in this update, so for a complete list, have a look over at our Larian forums, because this amount of text doesn't fit a Steam Announcement ;)
Full changelist: http://www.larian.com/forums/ubbthreads.php?ubb=showflat&Number=495144#Post495144
Cheers & have fun!