The 1.0 version of pianoATL for Mac was available as a free download on our website. The program relates to Audio & Video Tools. The actual developer of this free software for Mac is ButtonBass.
From the developer:
ButtonBass ATL piano is a free app that allows you to play the ATL Piano with your computer keyboard. Sync sounds using the space bar and stop sounds using the enter key. Script out songs in the player. This application has an intuitive user friendly interface.
You may want to check out more software for Mac, such as Mandala Virtual Brain, SmallScreen or Nodal CAD Software, which might be related to pianoATL.