I got an email that my Mac App Distribution certificate will expire soon. So I signed in and downloaded a new app distribution profile but when I double-click it, it I get an error that says "Only Development Provisioning Profiles can be installed in System Preferences. Production Provisioning Profiles are imported within Xcode." So I go to Xcode and I don't see where to import it. In Xcode Preferences under Accounts, I clicked on Manage Certificates, but it only lists them. If I hit the + button I get an error that says "You already have a current Mac App Distribution certificate or a pending certificate request."
How do I go about updating my Mac App Distribution certificate before it expires this month???