An eBay seller seeking a buyer for his 1GHz Power Mac G4 has installed Mac OS X Tiger on the machine, and claims it is running perfectly.

The owner told Macworld: "It is currently running the latest beta," however he insists that the official version of OS X Tiger, which goes on sale on April 29, "will be installed before the Mac is shipped to its new owner."

The current bid for the Mac is £375. The listing ends on April 28 at 4.15pm (UK time).

Apple will launch its newest version of Mac OS X on Friday April 29.