Available on new Macs and with backward compatibility on some older models, the latest release of Apple’s flagship operating system promises an amazing computing experience for most Mac and Macbook Pro users. As the follow-up to Apple’s last release, Sierra, macOS High Sierra takes things to the next level, like its name suggests, and includes brand new features and a refined look and performance. MacOS High Sierra is a free upcoming operating system from Apple developed for Macs and Macbook Pros.