Ccleaner для Mac OS системы скачать бесплатно macOS Sierra (version 10.12) est la treizième version du système d’exploitation macOS d’Apple pour les ordinateurs Macintosh. How to Perform a Clean Install of macOS Sierra macOS Sierra supports two clean install options that allow you to place a fresh copy of macOS on your Mac's startup drive or on a non-startup drive.Once you've determined that your Mac is capable of making use of the new OS, you should gather the following: macOS Sierra Installer, available from.
