Rentar's special has been changed to "Highly Protected".
This is all, if it's actually different, a difference between an earlier Windows version and the one on the SW website. (Or maybe a later version, for all I know.) It's not a PC/Mac thing.
Also, three things that I'd call "oddities" which as far as I know are not different from either BoE or earlier versions of E3:
- Hyperactivity isn't marked on the status bar, but seems to make the whole party magic resistant. I haven't experimented with it extensively but after I cast it, stoning attacks seem to have become dramatically less effective, although not totally ineffective.
- The same monsters do significantly more damage to PCs than to monsters, apparently due to a level-based saving throw.
- Splitting only works if there's a space without a magical field within 2 squares for the splitting monster to spawn a copy in.
- Dispel Fields has a chance (maybe the same chance, if so experimentally around 25%) of dispelling quickfire or antimagic in each square in its radius. It's almost impossible to imagine fighting quickfire this way, but this can be a way to defeat monsters generating antimagic fields (altho most of them have heavy magic resistances anyway).
Plus, a tiny little nitpicky thing almost nobody probably noticed: there's a town somewhere (I think) in the northwest where you can meet an evil priest in a shop - he's hostile by default, but if charmed he has dialogue. Not too interesting, but there's stuff about him being nearly blind that suggests it was intentional, or at least retroactively justified by writing. I sort of had to roll through the rest of the game trying to find out if anyone else talked when charmed (and I really hope I didn't miss anyone :<)