Yes! As long as you have the DLC files, you can transfer them to any version you want. The DLCs should be located in the "game" folder of the larger Our Life folder. You can send them to yourself, and put them in the new "game" folder of whatever version you're using. For the Mac version specifically, the "game" folder is kind of tucked away, so you'll have to go a few folders deep to find it. If you need more help with that process, just let me know, and thank you for playing!