I have been sent a secure CD of zip folders but double clicking only comes up with the message unable to unarchive, error 1 - operation not permitted, any ideas please?

I have been sent a secure CD of zip folders but double clicking only comes up with the message unable to unarchive, error 1 - operation not permitted, any ideas please?

First thing coming to mind:
do you double-click on the zip files on the CD ?
Maybe the "unzip" tries to write in-place to the CD which of course is not possible.
Have you tried to copy one of them to your OSX volume/harddisk and thhen double-click the copy ?
Stefan

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