You can either hook the MAC up to a HDTV with an HDMI cord, or you can have an Apple TV which can be used to mirror your Mac or other apple products on to your TV. It also does many other things as well but can be used for this process.
Open the 'System Preferences' of your Mac computer, and click on the 'Displays'.
Then you can open the Airplay. Change the 'Airplay Mirroring' from 'Off' to 'Office Apple TV', and it will connect automatically. A couple of seconds later, your Mac and widescreen TV will be connected.
Install Macgo Mac Blu-ray Player on Mac will improve your audiovisual quality.