Apple seeded its fourth beta build of macOS High Sierra to developers today, along with new betas of watchOS 4 and tvOS 11.
The new builds come two weeks after Apple dropped the last builds on developers that brought a bunch of new bug fixes and under the hood changes. Apple didn’t add quite as many major changes as it did on iOS 11 beta 4, but there are some notable improvements.
June 8, 2009: Apple promotes its 13-inch MacBook to join the MacBook Pro family, adding a speed bump, new FireWire 800 port, the first SD card slot on a MacBook, improved LED-backlit screen, and backlit keyboard across all models.