PC to Mac workflow

Hi, if I have a level I’ve made on a PC, what are the options to package for Mac users? I dont think there are any are there? Would I need to make the project on a Mac in order to package it for Mac users? What if I’ve already built the scene on my PC, is there anyway to transfer the level from PC to a Mac, and then package on Mac, can I do that or do I have to start from the beginning using the Mac?