Geohot done it Again, after the Succesfull release of blackra1n for Windows now he released the new version of Blackra1n for MAC users, which help them to Jailbreak iPhone 3G 3GS 3.1.2 on Mac OS X. So, what is blackra1n? blackra1n is a 30 second ALL device 3.1.2 jailbreak. Even the ipt3, but the ipt3 is tethered. In order to boot it, just rerun blackra1n. The instrustion are same as it is as Windows. Here are the Instructions.
Some More Tutorial for iphone USers
1. How to Jailbreak iPhone 3.1.2 with PwnageTool 3.1.4
2. How to Unlock iPhone 3.1.2 with ultrasn0w
can you still send multimedia messages after jailbreaking with blackra1n with att iphone