SofTest for Macintosh SofTest 11 runs on Mac OS X 10.6 Snow Leopard, and above, including Sierra. SofTest will not run on Mac OS X 10.5 Leopard. If you have Leopard, you will need to upgrade in order to use SofTest. Installing SofTest Taking an Exam The Word Processor Uploading Your Answers I can't install SofTest because because it is from an unidentified developer!!!