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Message: <blockquote data-quote="ramos1209" data-source="post: 1661452" data-attributes="member: 353907">Hello,thank you for your posts,reinstalling the os is my last solution. i am trying to figure out how to copy systemversion.plist located in /users/ramos/desktop/ to /system/library/coreservices/ but the real problem is that i have to change the permission to be able to cp systemversion.plist to coreservices.i am opening terminal using cmd+S and login under my user , i was able to locate the file using sudo nano, but unable to copy the files due to file permission. read only.i am not an expert in cmd but ive been digging up for a solution.at this point using terminal is my only solution. if its possible to change the file permission at this level.thank you.</blockquote>