iPhone Pwnage Cat & Mouse Game Continues with OS X Update

Apple released the 10.5.6 update to Leopard on Monday with a feature that makes it impossible to jailbreak and/or unlock an iPhone or iPod Touch using PwnageTool or QuickPwn, according to a report at iPhoneAlley.

Blogger Erica Sadun explains in more detail that engineers at Apple propagated to all 10.5.6 loaded Mac systems USB kexts (kernel extensions) that prevent a Mac from recognizing an iPhone or iPod in Device Firmware Update mode, a high level communication protocol used for firmware restores among other things.

The battle between Cupertino and a dedicated band of Apple users who believe the company’s mobile platform should be opened for general use and development outside the limitations of the AppStore has been going on since the original iPhone was unlocked weeks after its initial release in June 2007. Subsequent updates to the mobile firmware have ben decoded within days of their release.

Many, though not all users who jailbreak/unlock their iPhones do so to enable them to operate on cellular telephone networks other than AT&T, the exclusive authorized service provider in the US. Others see the advantage of an unlocked phone that can run software developed for it that has not otherwise been approved by Apple for sale and distribution in the iTunes AppStore.

Sadun confirmed with sources inside Apple that the current roadblock to unlocking efforts was deliberate and both she and iPhoneAlley suggested those wanting to operate jailbroken iPhones and iPod Touches ought to wait to install the 10.5.6 update on their Macs until developers working to maintain the open mobile platform have devised a workaround.

One possible avenue around the DFU mode restriction has been suggested by Phone developer Steven Troughton-Smith, who told Sadun the problem relates to devices plugged directly to Macs. He relates that DFU mode can be used with a unit connected via a hub and can be pwned as normal, even with the 10.5.6 update.