Apple's OS X Mavericks update, which was released for free on Tuesday, is already installed on 5.5 percent of all Macs and rising quickly.
That's according to advertising network Chitika, which says the OS is seeing three times the adoption of last year's OS X 10.8 "Mountain Lion" update during the same first 24-hour period.
One simple reason for that? The software update, which Apple says brings more than 200 new features to Macs, was given out for free. That's a first for Apple, which charged existing Mac owners $20 for last … Read more