Apple has released the fifth macOS High Sierra 10.13.3 beta for testing. The release comes one week after the fourth macOS 10.13.3 beta; Apple released the fifth beta versions of iOS and tvOS betas late last week.
Changes coming in macOS 10.13.3 are unclear for now. Apple shares this information on its developer portal:
About macOS 10.13.3 beta 5
The macOS 10.13.2 SDK provides support for developing macOS apps for systems running macOS 10.13.3. The SDK comes bundled with Xcode 9.2 available from the Mac App Store.
For information on the compatibility requirements for Xcode 9.2, see the Release Notes available from the developer library.
macOS 10.13.3 beta 5 supports:
- MacBook (Late 2009 or newer)
- MacBook Air (Late 2010 or newer)
- MacBook Pro (Mid 2010 or newer)
- Mac mini (Mid 2010 or newer)
- iMac (Late 2010 or newer)
- iMac Pro (2017)
- Mac Pro (Mid 2010 or newer)