aw, looks ilke @ivory for Mac doesn’t yet support non-Mastodon servers (including Akkoma and presumably other Pleroma derivatives). understandable, but I hope they consider adding in support soon :o
(alternatively I could do a @Ninji and write some galaxy brain intercepting proxy…)
Sadly, intercepting proxies in this direction would be fiddly: Mastodon API is higher level and more constrained than client-server ActivityPub, which is what Akkoma exposes.