Following the release of macOS Tahoe 26.2 on December 12, 2025, Apple has now seeded macOS Tahoe 26.3 beta 1 to developers. This release marks the beginning of the next point update cycle, giving early testers a first look at what’s coming next for Mac users.
The macOS 26.3 beta 1 comes with build number 25D5087f. As is typical with the first beta in a new update cycle, the focus is on bug fixes, performance improvements, and behind-the-scenes work, rather than major new features. Expect the first beta to be more about laying the groundwork for further refinements and updates in subsequent beta releases.
How to Update to macOS 26.3 Beta 1
To install macOS Tahoe 26.3 beta 1, follow these steps:
- Open System Settings on your Mac.
- Go to General.
- Tap Software Update.
- Select Beta Updates.
- Choose the macOS Tahoe Developer Beta option.
- Download and install the update.
Changes in macOS 26.3 Beta 1
Apple has not provided a detailed public changelog for macOS Tahoe 26.3 beta 1 at this time. As with most first betas, early testing typically focuses on bug fixes, performance enhancements, and other under-the-hood improvements that may not be immediately visible in the user interface.
As the beta progresses, Apple will likely release updated notes clarifying what changes have been made from one beta to the next. For now, this update marks the transition from macOS 26.2 to 26.3, with build 25D5087f kicking off the beta cycle.
Conclusion
macOS Tahoe 26.3 beta 1 is now available for developers, providing a sneak peek into the next update for Mac users. While it primarily focuses on bug fixes and performance improvements, it sets the foundation for further updates in the coming weeks. If you’ve installed the beta, share your observations and let us know if you’ve noticed any significant changes in macOS 26.3 beta 1 in the comments.
