mBlock 3.4.11 for Mac can be downloaded from our website for free. This free software for Mac OS X is an intellectual property of Shenzhen Maker Works Technology Co., Ltd. The program lies within Developer Tools, more precisely General.
mBlock is a graphical programming environment based on Scratch 2.0 Open Source Code that makes it easy to program Arduino projects and create interactive applications. The package contains everything to start working including Arduino driver, Arduino IDE, etc.
You may want to check out more software for Mac, such as iWeb Action Pack, wxFormBuilder or TopCoder UML Tool, which might be related to mBlock.