In line 226 of the link pkg NetLogo.m, I had to change
If[StringMatchQ[$System,"*Mac*"], FileNameJoin[{nlPath,"Java"}],...]
to just
FileNameJoin[{nlPath,"app"}]
to get it to work
(I'm running MacOS (and Mathematica 14), but NetLogo now installs with the same directories it does in Windoz, it seems)