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.