Seeing as we're getting much-needed fixes, there is an extremely important long-standing issue with the Mac OS X version of the game. I would go as far as to say that, until it is fixed, the game should not be categorized as compatible with OS X.
Blockland is unable to create new folders, now it seems even files in pre-existing folders. It gives the following error in red:
ResManager::openFileForWrite - failed to create a path for "[relative path]"
This is an issue that started around the static map depreciation, but it's effect was mitigated by me having a full Blockland install with many folders and files already in place. I have since gotten a new computer with a completely fresh install and the issue persisted. Due to this, Blockland is not creating any configuration files and does not save any settings you make (keybinds, initial networking settings etc.).
I even sent you a PM relating to this back in 2015 that gives some more information:
A while ago I noticed that whenever using OS X 10.9 steam version, Blockland spits out an OS error when trying to create files in nonexistent folders.
[...]
the folders I thought were missing, in the OS root folder ( / ). [...]

EDIT: Apparently I made
a topic relating to this and verified this is a problem that persists across installations on the steam-version. Greek2Me hypothesized this might be a path string length issue.