Apple released macOS 26.6 beta 4 to developers, build 25G5057c, one week after beta 3. The update continues a quiet test cycle focused on stability rather than features.

The only documented change so far traces back to beta 1, which fixed a bug where macOS deprecation notifications incorrectly flagged apps as Intel-only. Apple's release notes for beta 4 list no new fixes or additions.

With macOS 26.6 nearing final release, Apple's engineering attention has shifted to macOS 27 Golden Gate, unveiled at WWDC this month and slated for a fall launch. The current Tahoe beta cycle serves mainly as a maintenance bridge.

Developers can install the beta through System Settings under Software Update by selecting the macOS Developer Tahoe Beta channel. The rapid cadence suggests Apple aims to finalize 26.6 soon, clearing the deck for the larger Golden Gate transition later this year.