serious problems ahead, /usr/bin is not accessable any more in the new os x 10.11 el capitan
its protetected by SIP (sysem integretiy ..)
recommended is to install to /usr/local ..
phil, how will you deal with that ? - thanks !
http://www.infoworld.com/article/2988096/mac-os-x/sorry-unix-fans-os-x-el-capitan-kills-root.html
The current version of the OS X installer installs in /usr/local/bin, which should work in theory.
- Phil