It says that you are not a trusted publisher...

We are in the process of becoming a trusted publisher with both Microsoft and Apple. If you have any concerns about the software, please email us at info@midiscale.com.

I can't install the software on my MAC...

If you follow these instructions, you can install it on your MAC. Once we are a trusted publisher with MAC, you won't have to do this.

Do I need a MIDI controller to use MIDIScale?

No MIDI controller is necessary! Although we suggest one, you can start learning using your computer keyboard right away.

Do you suggest any MIDI keyboards?

How do I know MIDIScale is for me?

If you are trying to learn the piano, then MIDIScale is for you! There's a 14 day free trial, and if you don't like it, you can cancel any time.