sorry for the late reply again- I have tried this but since im unable to install the game on my mac on steam, the option to browse local files isnt even there. Thanks for the help though!!
I'm sorry. If you can't get the PC to work at all or salvage the data in anyway and have to start 100% fresh on Mac, than there wouldn't be a way to access the DLCs for Steam on Mac. But we are hoping next year to make OL available for Mac on Steam.