macOS X: Modify Permissions

Here’s how to modify permissions with the Info window:

1. Click a file or folder to select it.

2. From the File menu, select Get Info. The window shown below appears. (add screenshot)

3. Click the disclosure triangle next to Sharing & Permissions to display permissions for the selected file or folder.

4. Click the lock and authenticate with an administrator account.

5. Use the menus next to users and groups to change the permissions.

6. When you’re finished, close the Info window.

Changes are effective immediately.