PA6T is a dated chip, an old generation, Apple has gone on to A4 & A5 chips based on ARM rather than PowerPC. They're dropping support for it next year. It had military (UK, US) application, otherwise Apple would have dropped support a couple years ago. If you think Apple is going to extend it's support then you don't know Apple's history. Apple recently abandoned core duo, the first intel generation of Macs, that goes all the way back to 2006/7....