I'm looking for some of the sounds that come default on OS X, like the preferences lock/unlock:
I basically just want to copy the sound files onto my desktop.
All sounds are .aiff and you'll find many by going to:
Then right click on CoreAudio.component and click 'show package contents'
Then go into Contents>Resources>SystemSounds>finder>
Note that this is different in El Capitan but is what I used in several OS's before, ie: Yosemite, Maverick, etc