What’s the issue,
Do you want to download the version provided on techcommunity via the the “try free” tab is that it ?
If so, you need to be a little patient as current it is only available for Windows, we will be adding macOS and linux variants soon.
It will downloadable from here
If you have an empower account and the right licenses then you can of course install the macOS Designer using the official Software AG Installer.
regards,
John.