Apple’s Mac OS X has a beautiful graphical user interface, but under that there is a solid unix foundation. OS X is based on FreeBSD. This unix foundation has allowed OS X to have a native unix command line interface support.
I was using mutt as my primary email client for many years. But from the past three years or so I chose to move to Mail, the native OS X MUA, primarily due to my requirement of managing my calendar. However, very recently I decided to make another attempt to move to mutt and today is the day when I am installing mutt in my MacBook.