Hi nightotter,
Thanks for bringing your issue to the Apple Support Communities. From your post, I gathered that after signing up for Apple Music, when you click on Radio in iTunes on your Mac, nothing is showing under "Featured Stations", but on your iPhone you have the listings. I use Apple Music as well and I enjoy being able to select from different stations. I will be happy to help.
On the Mac, please completely quit out of iTunes by going to iTunes > Quit iTunes. Then hold the shift key down while you relaunch iTunes and see if the radio stations are now present. If the issue persists, then the next step would be to test in another user account on the Mac.
How to test an issue in another user account on your Mac
If you are still experiencing issues with the Apple Music Radio stations, please boot the Mac into safe mode and test. Please note that the audio will not work in safe mode, we are just wanting to see if you are able to see the radio stations.
Follow these steps to start up into safe mode.
- Start or restart your Mac.
- Immediately after you hear the startup sound, press and hold the Shift key.
- Release the Shift key when you see the Apple logo appear on the screen.
After the Apple logo appears, it might take longer than usual to reach the login screen or your desktop. This is because your Mac performs a directory check of your startup disk as part of safe mode.
To leave safe mode, restart your computer without pressing any keys during startup.
If an issue doesn't happen in safe mode
If an issue doesn't happen when your Mac is started in safe mode, try restarting again without pressing any keys at startup. If the issue appears to be resolved when you start up normally, it was possibly caused by a cache or a directory issue with your startup disk that safe mode fixed.
If you restart your Mac normally and an issue comes back when you reach your desktop, try disabling any login items that automatically open when you log in.
Try safe mode if your Mac doesn‘t finish starting up
Cheers!