Alternative to Boom (volume booster) I'm disappointed to see that http://www.globaldelight.com/ are discontinuing support for Boom1 and charging users to upgrade to Boom2. In fact their smallprint suggests they intend to charge for Boom3.

As a software developer, it would be against my conscience to charge multiple times for a simple utility that the operating system should have supplied.

So, I am looking for alternatives.  Is there any other way to increase the volume on a MacBook?

PS Is it just my imagination, or has the most recent OSX (El Capitan)  increased the maximum volume level? Since Boost stopped working, I haven't really noticed a problem watching movies.
Try the open source VLC


It can boost the audio by upto 200%. The equaliser let's you boost even further.






You can boost audio in iTunes too. Select the song and press Cmd+I


You can boost audio by another 100% and use equaliser too.