Justinmind 10.4 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. The program lies within Internet & Network Tools, more precisely General. This software for Mac OS X was originally produced by Justinmind.
From the developer:
All-in-one prototyping tool for web and mobile apps
Design from scratch. From clickable wireframes to completely interactive prototypes. We provide a full range of web interactions and mobile gestures, so that you can focus on creating delightful user experiences.
Visual Design
You can design the style, size and layout distribution of any UI element to fit the look and feel of your screens.
You may want to check out more Mac applications, such as JustinmindPrototyper, which might be similar to Justinmind.
Distribution