As well as the new iOS 11 Public Beta 3, Apple also released a new public beta of macOS, in the form of macOS High Sierra Public Beta 3.
The macOS High Sierra Public Beta 3 is now available to download from Apple’s Public Beta Testing program, you need to be a registered member of the program to download the software.
The macOS High Sierra Public Beta 3 brings a range of new features to the Mac. This includes support for Apple’s new AFPS files system. The update also includes support for external graphics cards.
You can find out more information about the macOS High Sierra Public Beta 3 over at Apple’s website at the link below. If you have not registered for the program, you will need to sing up to test it out.