It's me again. This time instead of undeleatable files I am having a problem with undeleatable directories. No it is not a system directory. I, in the past month changed user accounts on my Mac and previously locked files and folder became unmovable and undeletable and immune to changing permissions even from the command line. They can be copied, opened, and executed; and the copied versions can have their permissions changed. Yes I am running as Administrator I try sudo rmdir directoryname and I get rmdir: directoryname: Operation not permitted Thanks again for any advice!