Snap4Arduino 51.0 for Mac can be downloaded from our website for free. The actual developer of this free software for Mac is Edutec. Snap4Arduino for Mac lies within Developer Tools, more precisely General.
From the developer:
Snap4Arduino is a modification of the Snap visual programming language that lets you seamlessly interact with almost all versions of the Arduino electronic prototyping board.
You may want to check out more Mac applications, such as iWeb Action Pack, wxFormBuilder or AskKey, which might be similar to Snap4Arduino.