I know there is an app called Playonmac (https://www.playonmac.com/en/) that I used on my wifes machine to install the windows version of Steam so she could play Among Us, and it seemed to work perfectly. I can only assume you would be able to do the same with RageMP although it might involve reinstalling the Windows version of GTA through that app too.
I have no idea if it will work, but it might get you started.