Mac users also get the first privilege to download Pwnage 3.0 and jailbreak iPhone 3G OS 3.0.
How to Jailbreak iPhone 3G OS 3.0 Using Pwnage For Mac?
While the iPhone 2G users are lucky, as they can both Jailbreak and unlock iPhone 2G on Firmware 3.0, iPhone 3G users can only jailbreak their iPhones and have to wait to download ultrasn0w and unlock iPhone 3G.But then, if you are looking for a How To guide on using Pwnage 3.0 to jailbreak iPhone 3G with Firmware 3.0, iClassified has another excellent tutorial, with detailed instructions and video here.
But before jailbreaking iPhone 3G on your Mac, make sure that you have iTunes 8.2 and Mac OS X 10.5.7 installed. It would be even better if you the patience and can wait until the iPhone Dev team releases ultrasn0w.
Update 1: Windows users can now download redsn0w to jailbreak and unlock iphone 2G OS 3.0 on windows.
But don’t use redsn0w or Pwnage, if you are already on yellowsn0w and wait for ultrasn0w to be released.
Disclaimer: Jailbreaking and unlocking your iPhones are basically hacks and you do so at your own risk.