Apple on Monday released the third beta builds of iOS 12.3, tvOS 12.3, watchOS 5.2.1, and macOS 10.14.5 for testing by developers. Also released, a second build for the third-generation Apple TV software version 7.3.
The third iOS 12.3 beta is build number 16F5139e, which replaces the second build, 16F129d. The third build of watchOS 5.2.1 is build number 16U5101c, replacing build 16U5091b. The third build of tvOS 12.3 is build 16M5139a, replacing the second build 16M5129d. macOS 10.14.5’s third beta, build 18F118d, is the replacement for the second build, 18F108f. (Build info via AppleInsider)
Also released today is a second version of Apple TV Software 7.3, for the third-generation Apple TV. The build is number 12H833, which replaces the initial build of 12H825
The new builds are available to developers over the air on the devices with the proper configuration installed. Developers can also download the new betas from the Apple Developer Center.
As usual, MacTrast and Apple both warn users to not install the beta on your daily driver iPhone, iPad, Apple TV, Apple Watch or Mac computer, instead only install it on a device set aside for testing purposes.