Last week, staff writer and long-time Windows user Malcolm Owen returned to Mac following a five-year absence. Back to the Mac is a series of posts where he charts his progress in introducing Apple to his working environment once again. In this first installment, Malcolm talks about why he is making the change, and his Mac acquisition.Hello, I am Malcolm, and I have an admission to make: Up until recently, I was not a Mac user. That recently changed, but before I go into that, I have some explaining to do.