There's a KisMac2 0.3.4 lying around, I think from 2013, with a bit of an updated interface but not a new backend. I've found it unstable and stops scanning after a while.
Neither KisMac 0.3.3 nor KisMac 0.3.4 works with a USB ALFA AWUS036H card, clicking "Scan" does nothing, trying to adjust settings on KisMac2 crashes, and I'm running 10.10.