I would use TextEdit for such editing on OS X. And get Mike Ferris's  
"TextExtras" package, which gives you a nice menu item to re-set the line  
endings in files for CR, LF, or CR+LF...

	Rick

> On OS X I've only used nano to edit files.  Perhaps the
> editor you are using is using <cr> as a line terminator.  The config file 
> is not read in binary so I'd expect that to be handled correctly.  Maybe 
> not.  Can you save your file in "unix" mode?
>