I downloaded some weapon skins off the workshop. when I went to test them out in single player, the skins weren't loading. For instance, I replaced the pistols with Barreta 9mms. When I fire them, the custom sound works, but not the skins. Same with every other gun skin.
Is it because I have a mac or something? I understand that most games are very pc sided but shouldn't I be able to install some simple mods?