I've managed to set up CS Source using CrossOver to get it running on my iMac / Big Sur.
However, when I try to join your servers I get an error with most of the maps:
e.g. Missing map maps/gg_simpsons_field_v2.bsp, disconnecting
I can play the maps I have in my /maps folder, but any others (which is most of them) don't work and simply won't download.
I've searched the internet and have tried all the suggested settings in config, checked downloads are allowed etc. but nothing is working.
Perhaps someone has all the maps downloaded and can post a zip file?
Also some of the textures don't work on a few maps, so ideally the texture files as well.