Apple released the first public beta version of its desktop operating system – the macOS High Sierra 10.13.5. The public beta became available after a day of closed testing by the developers and a week after the release of macOS High Sierra 10.13.4 for the public.
How to become a part of Apple’s beta testing program for macOS High Sierra 10.13.5
To Get access to the beta test program, you have to signup for the program at Apple Beta Software Program website with your Apple ID, and already registered users can participate through the regular update mechanism in the Mac App Store.
macOS High Sierra 10.13.5 returns support for Messages in iCloud. Initially, it was tested in macOS High Sierra 10.13.4, but it was removed closer to the release. The function allows you to store messages from iMessages in the iCloud and synchronize them between devices, saving available space.
There were no more notable changes in macOS High Sierra 10.13.5. It can only be assumed that this will be a small update, with little changes like increased stability, better productivity, correcting mistakes and shortcomings.