My company has used Scarab for over two years now and it's worked great. We use it for bug tracking and for our help desk. It runs just fine for us under Windows. It's given OSS a good name at my company, and since then we've started using more and more OS tools.
SPE, Stani's Python Editor works with Mac. I've only ran it in Windows and Linux, but it's the best I've found. http://www.stani.be/python/spe/blog/
My company has used Scarab for over two years now and it's worked great. We use it for bug tracking and for our help desk. It runs just fine for us under Windows. It's given OSS a good name at my company, and since then we've started using more and more OS tools.