Doesn't work on macOS 10.12 Sierra

[ZevEisenberg]

PianoKeys was working fine under 10.11, but I've updated two machines to 10.12, and now PianoKeys doesn't stay running, or doesn't start at all. I'm not sure which, but when I look in Activity Monitor after running pianokeys && pianobar, I just see pianobar, and hitting the media control keys just opens iTunes.

I looked in Console.app, and I see this when I search for piano keys:

default 13:47:51.826720 -0400   pianokeys   subsystem: com.apple.SkyLight, category: default, enable_level: 0, persist_level: 0, default_ttl: 7, info_ttl: 0, debug_ttl: 0, generate_symptoms: 0, enable_oversize: 0, privacy_setting: 0, enable_private_data: 0
default 13:47:51.873992 -0400   kernel  AMFI: allowing exception handler for 'pianokeys' (27975) because the process is unsigned.
default 13:47:51.876290 -0400   kernel  AMFI: allowing exception handler for 'pianokeys' (27975) because the process is unsigned.