I’m working on Oliphaunt, a native macOS client for Mastodon. You can read more about it here: https://github.com/anosidium/Oliphaunt-Feedback-And-Support. I hope to release a TestFlight build soon, followed by an eventual App Store launch.
I’m also working on the next version of HacKit, a native macOS reader for Hacker News. You can already download it on the App Store: https://apps.apple.com/app/id1549557075, and you can read more about it here: https://github.com/anosidium/HacKit-Feedback-And-Support.