Just over a week after the release of the third, Apple today released the fourth test version of macOS 10.12.1.
Beta 4 (build 16B2548a) does not bring anything new compared to previous test versions; the first major update to Sierra does not bring about any major differences from the version we have today what we have are bug fixes and general performance improvements.
MacOS Sierra 10.12.1 beta 4 is now available on the Apple developer portal and the Mac App Store if you have the automatic download option enabled, the update will be downloaded in the background and you will receive a notification when it is ready for install. The new beta is expected to be available very soon also in the Apple Beta Software Program.
