Typically, Apple issues operating system updates to beta testers only for major point releases, such as iOS 26.5 or macOS 26.6. The minor-level point releases with two decimal points (e.g., macOS 26.6.1) generally bring little more than bug fixes and security updates that are pushed to users without any beta testing from developers or the public.
It’s unusual, then, that Apple just pushed out iOS and iPadOS 26.6.1 along with macOS 26.6.2 to beta testers. The number discrepancy is because macOS just got a 26.6.1 release to fix a security vulnerability that only affects macOS. The release notes state these new 26.6.1/26.6.2 betas only include security fixes, but they don’t say what they are. Apple does not update its Security Release page for beta releases.
It’s unclear whether these were published to the beta site by mistake or if Apple has some reason to test this small update in the wild. At any rate, it should release to the public within a week or two. Without knowing the content of the release, we can’t say how important it is yet.
If you’re in the beta test group, you can update to this latest version by opening Settings > General > Software Update.

