Some years ago I created an iOS app called WSPR Watch that queries the WSPRnet.org website and displays spots. As WSPRnet is free, my app is free (unlike at least one other).
Last year Apple released the ability to easily port iPad apps to macOS and so with just a few changes I was easily able to produce a macOS version.
Here's how it looks showing spots received by Phil, VK7JJ, who has particularly low noise reception in Tasmania.
The app has been approved by Apple is now available in the macOS App Store. Because of the Catalyst porting system it is only visible to people running macOS 10.15 Catalina.
I hope you like it.