My Programmer says:
hello this is the following path for the mac versions of Orc covenant to find the "game" folder so extract the dlc .rpa wherever you extract your game folder = OrcCovenant-1.09-mac\OrcCovenant.app\Contents\Resources\autorun\game add the rpa inside this "game" folder start the game so the dlc can be detected on the game initialization, avoid add the archive outside the game folder for avoid conflicts Here a step by step of where to find the directory on mac after you find where the version is installed (remember you need the last version to the game detect and play the dlc) = https://imgur.com/a/7tvZsOL