OS X: minor code changes and improvements.

git-svn-id: https://pcsxr.svn.codeplex.com/svn/pcsxr@90607 e17a0e51-4ae3-4d35-97c3-1a29b211df97
OS X: minor changes.

git-svn-id: https://pcsxr.svn.codeplex.com/svn/pcsxr@90608 e17a0e51-4ae3-4d35-97c3-1a29b211df97