High Sierra brings with it a lot of under the hood changes. The first developer beta is out today, while the initial public beta will come before the end of this month. Seriously, that's the name of the next macOS release, which will be finalized and shipping this fall as a free upgrade to owners of any Mac system that supported the Sierra release from last year. If you were wondering what comes after Sierra, the answer is High Sierra. Surprising absolutely no one, Apple has also revealed the next iteration of its operating system for computers today at the start of its developer conference. Huawei Mobile Partner Mac High Sierra 10.12.