Hello! I have a bit of an update to this with my experience of spending the past two hours attempting to get the NAM to work
The process I used is very similar to @Identitor 's.
1) Download latest NAM for MacOS
2) Open .dmg and read included readme for tips and advice
3) Drag the NAM wrapper to the desktop
4) Right click/2 finger click (if you are using a Macbook Trackpad) and click "Show Package Contents"
5) Open Wineskin
6) Click "Set Screen Options"
7) There will be 3 boxes checked here, "Use Mac Driver instead of X11", "Decorate Windows", and "Auto Detect GPU for Direct3D", Click on "Use Mac Driver instead of X11" and "Auto Detect GPU for Direct3D" to deselect them
8) Click Done
9) Close out of all windows pertaining to NAM Wrapper
10) Start NAM Wrapper, folllow prompts and select installation
~there may be an issue here where the installer gets stuck stating that there is a file needing to be deleted. If this happens, delete that file and restart the wrapper~
11) Make sure that all of the files ended up where they needed to go to for whichever version you are using, then start SC4 and test
12) Enjoy