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Lock a document on Mac

To protect documents from being accidentally changed or deleted, you can lock them. When a document is locked, you receive a warning when you move it to the Trash. When you empty the Trash, the locked document is deleted.

On your Mac, do one of the following:

Lock a closed document: Select it, choose File > Get Info, then select Locked.
Lock an open document: Hold the pointer to the right of the document title, click the down arrow , then select Locked.

To unlock a document, deselect Locked.

To protect folders and disks, change permissions for them.

See alsoCreate and work with documents on Mac If you need permission to open an item on Mac Get file, folder, and disk information on Mac

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