PowerBook signed by Paul McCartney up for auction

“The most valuable G4 PowerBook in the world,” according to Macworld UK, “signed by Sir Paul McCartney – is being auctioned to raise funds for a kidney dialysis ward for children in the North East of England. Donated to the charity – the Alice Skinner Appeal – by Paul and Heather McCartney, the PowerBook was signed in LA in October 2002. The celebrity couple agreed to auction the item to help raise money for the appeal. As well as Sir Paul’s signature, the PowerBook carries a