"Apple is now offering upgrades to the latest version of OS X for
free. When Linux inventor Linus Torvalds was asked whether this
threatened Linux (presumably by someone who had only a passing knowledge
of all the things 'free' can mean when applied to software) it gave him
an opportunity for a passionate defense of open source. Torvalds also says that he'll keep programming until it gets 'not interesting,' which hasn't happened yet." The newest version of OS X may be gratis for Apple hardware buyers, but it's notably far from the original, (literally) un-branded sense of "mavericks."
