Recently made the switch and am trying to get used to OS X. I have about 2k mp3s that I moved from my windows machine. However, I tossed about 500 dupes that got onto my mac. The problem is that I locked them when they were on my windows machine so that the names et al could not be changed. On windows, I would highlight all the files at once and open properties. Then I could lock all the files with one click. How can I unlock all the files on OS X? I "right click" and chose more info. It gives me the option to lock/unlock but only for 1 file at a time. I cannot delete the dupes until I unlock the files.