Zsh permission denied macOS Big Sur

To fix the permission denied error in Linux, one needs to change the file permission of the script . Use the “chmod” (change mode) command for this purpose. But before that, check the file permission.

About Permissions

Hold the Ctrl key, click your user account’s name in the left pane, and select “Advanced Options.” Click the “Login Shell” dropdown box and select “/bin/bash” to use Bash as your default shell or “/bin/zsh” to use Zsh as your default shell. Click “OK” to save your changes.

Your most likely encounter with a “Permission Denied” error is if you try to install a program or modify a file that’s locked — either because you’re not an administrator, or because the owner of the file used chmod to lock the file.

Open Disk Utility and run a permissions repair on your startup volume:

Apply permissions to all items in a folder or a disk

Go to Security & Privacy. In the Security & Privacy window go to the Privacy tab then click the Padlock at the bottom left. Enter the administrator User Name and Password then click Unlock. In the left pane you’ll find the services and devices you can grant or deny access to for the apps in the right pane.