Download of Structure Checker 5.11.5 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free software for Mac OS X is a product of ChemAxon Ltd.
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 following version: 5.1 is the most frequently downloaded one by the program users. The unique ID for this app's bundle is com.install4j.0603-6063-1750-8701.57191. The software lies within Games, more precisely Board.
From the developer:
Structure Checker is an interactive tool to detect and fix issues using ChemAxon’s JChem technology. It comes with numerous checkers and fixers to search and correct various structural issues. The correction process can be manual, completely automatic, or somewhere in between.
You may want to check out more software for Mac, such as Power Structure™, Structurer or Oh! My Mind Mapping - Structures and Schemes, which might be similar to Structure Checker.