
The use of an equal sign ( =) wipes all previous permissions for that category.Terminal is an application that provides provides text-based access to the operating system, in contrast to the mostly graphical nature of the user experience of OS X, by providing a command lined interface to the operating system. The u flag sets the permissions for the file owner, g refers to the user group, while o refers to all other users.

To remove all existing permissions, set read and write access for the user while allowing read access for all other users, type: chmod u=rw,g=r,o=r file.txt To set file permissions, you’ll use the chmodcommand at the terminal. RELATED: How macOS Catalina's New Security Features Work Setting File Permissions This is related in part to new security features introduced in macOS Catalina, although file access control lists (ACLs) have been a Mac feature since macOS X 10.4 Tiger back in 2005. If the final character is an at sign ( then it signifies that the file or folder has extended file attributes relating to security, giving certain apps (like Finder) persistent file access.
