An anonymous reader shares a report on Yahoo (edited): Last year, Fletcher Previn became a cult figure of sorts in the world of enterprise IT. As IBM's VP of Workplace as a Service, Previn is the guy responsible for turning IBM (the company that invented the PC) into an Apple Mac house. Previn gave a great presentation at last year's Jamf tech conference where he said Macs were less expensive to support than Windows. Only 5% of IBM's Mac employees needed help desk support versus 40% of PC users. At that time, some 30,000 IBM employees were using Macs. Today 90,000 of them are, he said. And IBM ultimately plans to distribute 150,000 to 200,000 Macs to workers, meaning about half of IBM's approximately 370,000 employees will have Macs. Previn's team is responsible for all the company's PCs, not just the Macs. All told IBM's IT department supports about 604,000 laptops between employees and its 100,000+ contractors. Most of them are Windows machines -- 442,000 -- while 90,000 are Macs and 72,000 are Linux PCs. IBM is adding about 1,300 Macs a week, Previn said.