Downloading FX Draw 6 20.10.15 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. The program lies within Design & Photo Tools, more precisely Viewers & Editors. This software for Mac OS X was originally designed by Efofex Software. We recommend checking the downloaded files with any free antivirus.
From the developer:
FX Draw 6 for Mac OS provides a high-productivity drawing environment designed specifically for mathematics teachers. With this application you can create high-quality diagrams for tests, exams, worksheets, web sites, presentations and demonstrations.
You may want to check out more software for Mac, such as FX Draw 5, Paint FX or Screenshot FX, which might be similar to FX Draw 6.