how to I sign in and sign out of Mac mail account?
although this seems like a simple issue, I can't seem to figure out how to sign into my Mac email account. I'm stuck offline.
MacBook Air 13″, macOS 10.15
I'm not on Catalina but if it's the same as previous versions, you go to System Preferences and select Internet Accounts.
From there you can set up Mail to work with your email provider.