A sixth beta of macOS 10.13.5 has been provided to developers for testing on Wednesday, the fourth beta release for the operating system in May alone, with it made available to download one day after iOS 11.4, tvOS 11.4, and watchOS 4.3.1 were released to the public.
The beta code is available to download from the Apple Developer Center, for developers registered into the testing program. A public beta version is typically provided a few days after the developer variant is seeded.
The sixth beta of macOS High Sierra 10.13.5 has build number 17G31f, while the fifth beta was build number 17F70a.
The main feature inclusion in the 10.13.5 betas has been support for Messages in iCloud, allowing it to work with the counterpart feature in the iOS betas. The feature synchronizes a user’s messages stack between multiple devices logged into the same iCloud account, with old messages stored online but downloaded when required.
The release notes for the new beta do not detail any new inclusions, which could be a sign that it is nearing a final public release.
AppleInsider is currently testing out the new code to find out what changes have been introduced, if any.
AppleInsider, and Apple itself, strongly advise against installing beta releases on mission-critical hardware, due to the potential loss of data. Use secondary devices for beta testing, where available, and keep backups of any important data before installation or updating the software.