I was unaware but it seems that wine works on macOS? Not sure how compatible it is tho.
wine has official builds for up to 10.14 mojave. it's technically possible to get it working with 10.15 catalina but you will only be able to run 64 bit windows executables as of right now
edit: apparently crossover (basically a fork of wine,
https://www.codeweavers.com/products/crossover-mac) is able to run 32 bit windows executables on catalina based on my research. this is a paid solution however
edit 2: crossover loads Blockland up (and it auths with steam too!). good performance on single player, badspot's speedkart, and rising lava; however on the BCS server (which has several addons and takes a good while to load on my main windows pc) i get timed out after staying on "loading objects" for a while.
on a technical level: although you can't run 32 bit binaries, you can run 32 bit code within a 64 bit binary. crossover uses this functionality to run 32 bit windows executables