LocalRadio - LocalRadio is computer software for listening to "Software-Defined Radio" on your Mac and cell products. SDR - macOS native desktop Software Defined Radio application working with the RTL-SDR USB device. Tunes-Volume-Control - This app allows you to handle the iTunes volume making use of volume up and quantity down hotkeys. MuteMic - macOS app to mute & unmute the input quantity of your microphone.