Io Interpreter 5.1.1 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.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The program is categorized as Lifestyle Tools. This software for Mac OS X is a product of Time Cycles Researc.
From the developer:
This is one of most popular packages because the Interpreters are great for non-astrologers, astrological entrepreneurs, Professional Counseling Astrologers, and new students just learning the art of interpreting a chart (students, learn how to interprets a chart from real pro's and provide great reports at the same time).
You may want to check out more Mac applications, such as Frame.io, Proto.io or 4D Runtime Interpreted, which might be related to Io Interpreter.