George Hotz has now added a mac version of purplera1n to purplera1n.com and an upgrade to the PC version. This is currently the only option for jailbreaking the iPhone 3GS. Let us know how it works for you. Again, no support for winterboard yet.
You asked for it, and we delivered. I’m not a mac coder, so AriX and westbaer stepped up to do it. Check out AriX’s blog here. Download link on purplera1n.com, and thank AriX and westbaer next time you see them!
Also, some more payload stability improvements were made, and the windows version was updated to RC2a. There is no reason to run RC2a if you already have RC2 installed.