Installing Postman on Macĭownload and unzip the app using the built-in Archive Utility app. Note that the Postman team only tests, fixes bugs, and provides support for the app on Mac, Windows, Linux, and the web. Troubleshooting your Postman installation.To get the latest version of the Postman desktop app, visit the download page and select Download for your platform. Postman is available on the web at go./home and as a native desktop app for Mac, Windows (32-bit / 64-bit), and Linux (32-bit / 64-bit) operating systems.