They are all good. Debian and Pop are very similar. Fedora is great and if comes with Gnome which is the desktop environment. If you are coming from MacOS Gnome will feel more like what you are used to. But you can use Gnome on any of the distros.

I think Pop and Debian have more packages/apps in their systems so if that is important go with either of them. I've not use used Pop but many people love it. Debian is incredibly solid. I have never tried to use it as a desktop but I hear it is great.

I'd say just pick one and go. Any of those three would be a good start.