My apologies if my terminology is not correct below.
I had a problem with my iMac, which meant I had to shut down, and retrieve my documents after a 'reboot'.
I'm struggling to add any of my mail accounts, e.g. "...failed to authenticate with Yahoo..." and don't even know where to look for my Microsoft 365 Personal, for which I paid an annual subscription in April-24.
Can anybody help?
iMac 21.5″, macOS 10.13
Are you runing 10.13.6 as shown???
On Yahoo...
Mac's Mail App is not as modern as iOS's Mail app, Many eMail providers now require a separate App Password different from your eMail password…
Yahoo has gone to this too...
https://help.yahoo.com/kb/access-yahoo-mail-third-party-apps-sln15241.html
Cox for Apple Mail…
https://forums.cox.com/discussions/internet/using-yahoo-email-in-mac-os-mail-app/151730
Yahoo cure, thanks to tekkaman65535…
yahoo mail failed to authenticate - Apple Community
https://discussions.apple.com/thread/254879377?answerId=259375262022#259375262022
tekkaman65535 Posted on Aug 9, 2023 10:20 AM
I found a solution for this.
This worked for me and I now have my Yahoo! emails actively coming into the Mail app on my Mac.
yahoo mail failed to authenticate - Apple Community
Yahoo App password…
Generate and manage third-party app passwords
Some older, third-party email apps (that do not use our Yahoo branded sign in page) require you to enter a single password for login credentials. To access your Yahoo Mail account on these apps, you'll need to generate and use an app password. An app password is a long, randomly generated code that gives a non-Yahoo app permission to access your Yahoo account. You’ll only need to provide this code once to sign in to your third-party email app.
https://help.yahoo.com/kb/access-yahoo-mail-third-party-apps-sln15241.html
Most likely biggest factor is using Other in Mail setup, then using a Browser that doesn’t have Yahoo PW stored init to get the App PW.
Changed Yahoo password, yahoo stopped sen… - Apple Community
Unable to load Mail, Excel or Word on my iMac
