So I downloaded two free mixtapes recently and I was unable to open the first. I downloaded it again and tried again, same error. I figured no big deal, but when I got the same 'Error 1 - Operation Not Permitted' for the second file days later, I got mad. I repaired disc permissions and tried again, still the same error. So I tried with StuffIt and it said "The archive may be damaged (Error #17537)". I downloaded Zipeg and tried both files-it said 'file type not supported'. I tried the Terminal: grant-austins-macbook:~ Grant$ unzip bobbyraynodj.zip unzip: cannot find or open bobbyraynodj.zip, bobbyraynodj.zip.zip or bobbyraynodj.zip.ZIP. Same error for the other file. After all that, I restarted and tried it all again, and got the same results. So what's the trick? Please help! Thanks.