I'm trying to help a friend (she's a Mom) who has a Mac. I'm not savvy with Macs but can following techno directions. She wants to view the temporary internet files her children view and wants to prevent them from deleting them. Is there a setting or password she can set so they cannot delete the files or is there a temp file she can view the temporary files. We have set up all children separately with logins and have their downloads saved to a file in her download files. Thanks.