Finally set up my Mastodon development environment on my Mac.
Since the setup on macOS differs a little from Linux, I wrote up the steps and submitted a pull request for the documentation. Until that’s merged, you can view it here:
https://mastodon.ar.al/media/mLroNlt4cKvse3bQipQ https://mastodon.ar.al/media/X_U07cJj1I4pKvuFP-k
The setup instructions for Mastodon development on Mac have now been merged into master in the documentation (thanks @Gargron
https://github.com/tootsuite/documentation/blob/master/Running-Mastodon/Development-guide.md#mac