So, full credit to Craig for finding something I didn’t know existed, namely a beta version of MLB.TV for Mac that doesn’t require Flash and runs as its own app rather than in a browser window.
It’s important to note this app is in beta. It’s very basic and obviously needs some work. Still, it’s nice to have a standalone app for listening to game audio during the day without having to worry about your browser being open. This does require an MLB.tv membership which, depending on your needs, could cost over $100. I pay the $20 yearly to always have a high quality stream of the legendary Tom Hamilton in my ears.