You can now download and install the first developer beta of tvOS 26.3 with build number 23K5585c on your Apple TV right now.
Apple Releases tvOS 26.3 Beta 1 for Registered Developers, Download it Today
I’m sure you’re enjoying the new tvOS 26.2 update on your Apple TV. If you’re bored from it already, then go right ahead and download the new tvOS 26.3 beta update on it.
As long as you’re enrolled into the Apple Developer Program, which happens to be free if you’re just testing Apple’s beta software, you can download any tvOS beta on your Apple TV.
Once signed up to the Developer Program website using your Apple Account, go to Settings > System > Get Beta Updates, and choose tvOS 26 Developer Beta.
Now simply go to Settings > System > Software Updates > Update Software, and you’ll see the new tvOS 26.3 developer beta available for download.
