svnadmin create /some_directory/svnRepo

svn import /some_old_directory file:///Users/bob/some_directory/svnRepo/some_name -m "some comment"

svn checkout file:///Users/bob/some_directory/svnRepo/some_name new_target_directory

svn commit -m "some other comments"

svn status

svn update -r 1

refer to

http://www.rubyrobot.org/tutorial/subversion-with-mac-os-x