I don't think so. . .I also play on a Mac laptop, or used to (it kept over-heating, so I transferred my saved games to my older PC desktop), and I had issues with Origin because they don't support Macs. I had to buy each game/expansion in a physical format so that it could be correctly installed. I don't know of any way to transfer an Origin-purchased download from a PC to a Mac (I am also a desktop support person in real life, so I know a few things about data/software transfer).
Instead of partitioning your hard drive, have you considered a VM?