Hi, finally got around to playing after buying the preorder for mac. I ran into one possible bug, at some point, I was unable to use the light gadget. Every time I tried the hand on it a tutorial box came up saying that If you are zoomed in on scenes or items, you must exit before zooming to a new scene or item. The problem is that it was doing this on every scene, even when I wasn't zoomed in on something. I've since gotten around by restoring an earlier save, but I thought I'd let you know of this problem, I didn't see anyone else encounter it.
Yeah we've had a few reports of people running into this, it was happening in the initial game release but has been fixed since. Depending on which retailer you bought the game from you should be able to just redownload the installer to get the fixed version if needed. If you need to do that and have any trouble let me know.
And you will be able to use your existing saves, so you won't have to replay the game up to that point, either. :)