FSEvents API in Mac OS X - fseventer

http://en.wikipedia.org/wiki/FSEvents

http://www.fernlightning.com/doku.php?id=software%3afseventer%3astart

http://therealnirv.wordpress.com/2013/09/24/who-doesnt-love-fseventer/

http://mac.majorgeeks.com/files/details/fseventer.html