The new operating system for Mac is a huge update

Mac OS X has been around so long that Nickelback had the number one single the year it launched. OS X is officially dead, and has been renamed macOS. The first version of macOS, codenamed Sierra, launches this fall as a free update for most Macs. But there's a public beta version out now, and I've been testing it for the last week or so. There are tons of changes in Sierra, and they all add up to a big, significant update for the Mac.