While this is fresh in my head, I'll bash out these instructions. You'll need a USB thumb drive of 8Mb capacity, named "Untitled". It will be erased as part of the process so make sure it's either empty or contains nothing of value. Download macOS from the Mac App Store. It will auto boot, so...

Apple’s senior vice president of software engineering, Craig Federighi, took to the stage at Apple’s WWDC to announce that OS X is now macOS, and that the next update will be macOS Sierra. Federighi went through eight new features that will be included in Sierra. First feature up is Auto...