MirrorMeister is app that allows you to mirror a screen of your iPhone, iPad or Mac to a TV. All you need is internet connection.

More info

To enjoy the best mirroring experience for your Mac, download and install our audio driver! For any questions please follow the installation guide below.
Make sure that the volume output on your Mac (use the keyboard volume buttons) is set to maximum volume. Increase the volume on your TV with your TV remote control.

If you still have low volume output, then open “Audio MIDI Setup” on your Mac. Just type the name in the Spotlight search on the right top corner of your Mac.