I'm a Mac user, who's been running BIAB Windows 2009 with VMware Fusion, and it runs nearly flawlessly. There are limitations -- can't use any of my Firewire peripherals (neither Fusion nor Parallels will recognize them), and waiting for a second OS to boot is a bit of a drag, not to mention that the second OS eats up additional RAM. It's also more difficult (for RAM and other reasons) to run other Mac OSX audio or video software simultaneously with Windows BIAB. And there are other things I don't like about Windows (like having to run and update my antivirus software all the time).

I also have BIAB 2009 for Mac. But I haven't used it that much, since it seems to be missing a few features, and by now I'm comfortable with the Windows version, along with its various plugs-in (like Forte) not available on the Mac.

In my ideal world, PG would sell me a version I could run on either platform, with all the RealTracks and RealDrums also ready to run on both. But PG apparently won't.

I can't afford to keep upgrading BIAB on both platforms simultaneously forever, even at PG's reasonable upgrade prices. So could somebody tell me:

- How do Mac BIAB 2009.5 and Windows BIAB 2009.5 compare?
- Any features I'll have to kiss goodbye to, if I upgrade only my Mac version to 2009.5? 
What about the audio features in the Windows version -- what's missing in the Mac version? (I like the TC Helicon harmonizer in the Windows version.)
- Is there anything the latest Mac version does that the Windows version doesn’t do, or does better?
- What about the overall speed of the program on each platform?
- Do the Mac and Windows versions work equally well with third-party styles?

I'm also interested in what "crossgrade" pricing PG offers -- didn't see it on the web site -- but if I go all-Mac, I’ll need all the BAIB styles, realtracks, realdrums, and every solo disk as well (already own them all, except for the latest ones just announced, for the Windows version.)