Following yesterday’s release of the fourth developer build, Apple today seeded public beta testers with the third beta of macOS High Sierra for testing on the Mac. This comes two weeks since the second build was seeded to the same party.
If your Mac is registered to receive preview builds, head over to the “Updates” tab in the App Store and check for updates. There, you’ll find the new build ready to install. Just click the “Update” button next to the macOS High Sierra 10.13 Beta 3 listing and restart your Mac. The process may take a little while, so be patient and don’t turn off your Mac manually if you don’t have to.
macOS High Sierra includes the Apple File System to make using your Mac faster, Metal 2 with native VR support, updates to Siri including all-new voices, autoplay blocking in Safari, and support for external GPUs you may wanna hook up for heavy workloads or intense games.
We’ll update this article with any important changes made to the OS since its last beta.