How to Dual Boot MacOS High Sierra Beta & Sierra on Partitions

The macOS High Sierra beta can be installed and dual booted alongside a stable release of MacOS Sierra, El Capitan, or another Mac OS X release. This can be a suitable option for developers, beta testers, and pro users who want to try out the new MacOS 10.13 beta release without overly committing to it, as it leaves the primary stable macOS release intact on the same computer and does not overwrite it. When finished, you will be able to boot between either the beta macOS High Sierra release, or the stable macOS release that already was on the Mac.


















