No more “big cat” names. Since October 2013, there’s been Mavericks, Yosemite, El Capitan, … and last week Sierra, the latest (free) upgrade to the operating system (system software) for Apple’s Mac desktop and notebook computers. Now called macOS vs Mac OS X. As noted on Wikipedia: macOS 10.12 Sierra was released on September 20,… Continue reading macOS Sierra — Apple’s latest Mac upgrade