You could have downloaded PostmanCanary 9.12 for Mac from our software library for free. The actual developer of this free Mac application is Postman, Inc. The application lies within Developer Tools, more precisely Webmaster Tools.
From the developer:
Postman Canary executes requests, scripts and tests on Postman’s native apps. Postman Canary can be downloaded and run separately from the main Postman app. Of course, if you have a Postman account, you can sync seamlessly between the production and the Canary apps to get a test of the new features without disturbing your workflow.
You may want to check out more software for Mac, such as ModelBaker, iGooMap or PageRank Viewer, which might be similar to PostmanCanary.