Why Cant I Software Update My Mac. 2 Manage your software update preferences. Open the Apple menu and select Software Update This will open a new window that will check for any available system updates.
Release the Shift key when you see the login window. To have your Mac check for updates automatically select Check for updates. Or click More info to see details about each update and select specific updates to install.
I had this issue.
This will disable automatic updates from being downloaded and installed on your Mac. Or click More info to see details about each update and select specific updates to install. You may even see a notification that an update is available. I had this issue.