Thank you for playing the game, happy you liked it!
Unfortunately, I dropped support for the Mac version after v1.2.0 and the new dungeons were introduced in v1.3.0. There were multiple reasons for dropping Mac, like requiring notarization which meant I'd have to get a Mac and a registered dev account with them, as opposed to being able to just build from Windows as I previously did. Difficulty in testing and the fact that less than 50 people bought the game on Mac so far meant there was no justification to keep supporting it.
I am sorry that you're unable to play the other dungeons.