This guide provides clear steps to resolve duplicate Blue microphone entries appearing in your Mac's Input device list.
Open System Settings on your Mac device.
Select General > Login Items & Extensions (scroll down).
Select Logitech G HUB Driver Extensions.
Enable the Logitech G HUB HID Driver Extension and the Logitech Blue Voice Extension in the menu (as shown below).

Enable/Allow G HUB from the list of applications. (This helps G HUB to unblock the Logitech HID & BLUE Vo!ce drivers).
To verify if the settings are successful, open Terminal on your Mac device.
Enter the command $ systemextensionsctl list
The Terminal will display Logitech Blue Voice Extension and G HUB HID Driver Extension as [activated enabled]. Click here for screenshot reference.
Repeat the process if necessary.
Important Notice: The Firmware Update Tool is no longer supported or maintained by Logitech. We highly recommend using Logi Options+ for your supported Logitech devices. We are here to assist you during this transition.
Important Notice: The Logitech Preference Manager is no longer supported or maintained by Logitech. We highly recommend using Logi Options+ for your supported Logitech devices. We are here to assist you during this transition.
Important Notice: The Logitech Control Center is no longer supported or maintained by Logitech. We highly recommend using Logi Options+ for your supported Logitech devices. We are here to assist you during this transition.
Important Notice: The Logitech Connection Utility is no longer supported or maintained by Logitech. We highly recommend using Logi Options+ for your supported Logitech devices. We are here to assist you during this transition.
Important Notice: The Unifying Software is no longer supported or maintained by Logitech. We highly recommend using Logi Options+ for your supported Logitech devices. We are here to assist you during this transition.
Important Notice: The SetPoint software is no longer supported or maintained by Logitech. We highly recommend using Logi Options+ for your supported Logitech devices. We are here to assist you during this transition.
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