In the months we’ve talked about the new iPhone, starting from the time we were still calling it an iPhone 5, most of the rumors we’ve gathered have pertained to the device’s exterior. Design-related rumors have dominated things, and occasionally we’ve heard details on Retina Display and how it would play a part on the sixth-generation Apple smartphone.

Finally, we have some details regarding what’s inside the new iPhone.

Tech site, 9to5Mac took a look at a beta version of Apple’s forthcoming operating system, iOS 6, and for starters, the platform will be using Darwin Kernel v13.0.0 with an ARM S5L8950X processor. The XNU build version is listed as 21xx.

This is a curious development, as Mac OS 10.8 Mountain Lion uses Darwin Kernel v12.0.0 with an XNU build number of 2050.5.8. As for the ARM processor used, iOS 6 will apparently be using one that is a version above the S5L8940X, which appeared in the iPhone 4S and S5L8945X on the new iPad.

Could iOS 6 indeed shape up to be more advanced than the latest Mac OS?

The processor, on the other hand, will be another part of the “A5” family”, according to sources. Hopefully it would turn out to be another improvement on the original A5, though as of now, we don’t know much else. 1 GB RAM will support the CPU and “SGX543RC*” GPU, the latter of which is still part of the system-on-chip.

All of this looks quite promising, and the above sources added that Apple is making good time on the development of iOS 6. This should guarantee a fall 2012 release for the iPhone 5, perhaps even earlier than the forecasted October 2012 release schedule.