I've currently no experience with MacOS and only a minority uses it.
This is not a "will never come" but it's unlikely that it will come sonly without anyone helping me out in that field.
//Moved to suggestions & feedback
Is there anything in the server log?
Avatars work fine for me :D
Well its kinda interesting that I'm not experiencing the convert error nor the avatar issue^^
Even with a presetup where it should fail :D