I am not sure about the Mac. I do not have one. Have you tried OpenLedger web wallet? You can add the api server address "ws://52.6.149.0/ws" and change to it. Click on elsewhere like Explorer->blockchain and refresh/reload. This will change it to MUSE. Although OL webwallet is not meant for MUSE, you can do most of the basic muse wallet functions there. It saves a lot of time.