Windows to mac to package for mac

Hey so I’m trying to get my packaged project for mac so I zipped up my windows project, got it onto my macbook, downloaded the same engine version and now I open it, it asks to rebuild modules and then it says that it could not be compiled, try rebuilding from sources manually.
PLEASE can someone help me, I’m really struggling

Update, I go on vs on mac all of the build options are greyed out for some reason? I have no idea why