As the macOS and iOS SDKs continue to evolve, it can be hard to find what changed, especially in the smaller point releases. For example, macOS 26.1 introduced new APIs for setting scroll edge effects that largely went unnoticed.
We wrote a tool that algorithmically generates API diffs between Apple SDK versions, and you can check out the results at: https://sdkdiffs.furnacecreek.org. We’ll keep this up-to-date with each new release, and we’d love to know what hidden gems you find!