I too am facing this, Although for me the mouse works but keyboard does not even pair to the Macbook pro anymore. Both are unifying reciever based devices. would appreciate if someone / logitech fixes this.
Same. I have a logitech k350 keyboard. the unifying application shows it connected, but only in the "advanced" settings. the volume control button works, but none of the other keys. i have set up all the security/privacy settings correctly in the system prefs and restarted multiple times but nothing is working.
Then reinstalled what appears to be the most recent Logitech drivers for Mac: "Logicool". I say 'appears' because it is the only download that lists 10.15 as an available Mac OS version. And the "Logitech firmware update" which recognized the Unifying receiver and reported a successful firmware update.
Then verified that both the Logitech Control Center Deamon and the Logicool Unifying Software were enabled in the "Input Monitoring" panel of the "Privacy" tab of the "Security & Privacy" System Preference Pane.
Using the "Advanced" option....the keyboard is recognized (state goes from inactive to active when you pound on the keys), yet no characters appear either in the Unifying test box or anywhere in the computer itself.
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