Microsoft has confirmed its use of Power Mac G5s in Xbox 360 game development.

A report from Cnet reveals that video clips of games running on the console, “are running on Macs, Microsoft confirmed on Friday”.

The Redmond firm used G5s because hardware elements of the PowerPC-based machines let Xbox developers “emulate some of the technology behind Xbox products and services.” It appears a native development platform is also in development.

The new Xbox uses a custom-made IBM PowerPC-based three-core chip running at 3.2GHz, and supported by 512MB of GDDR3 RAM. The processor is based on IBM’s Power 5 chip architecture.

Equipped with a 20GB hard drive, Xbox 360 also offers 512MB of GDDR3 RAM and an ATI graphics processing unit running at 500 MHz, with 10MB of embedded DRAM - one of the fastest such processors in the industry.

The unit will ship with a 12X dual-layer DVD-ROM drive, three USB 2.0 ports, two memory unit slots, and support for four wireless game controllers. It supports progressive-scan DVD movies and a slew of DVD and CD formats.