We dropped official macOS support in 2021 due to lack of a dedicated maintainer, and frankly, lack of interest in it. We do have a handful of people who find and fix bugs on macOS, so for the most part it still works if you build from source (following the instructions in macOS (source) — ROS 2 Documentation: Rolling documentation).
As always, if you find problems with macOS support, we are happy to review pull requests that fix a bug there.