For the support of Mac mail users, it has an inbuilt feature to sync and configure Yahoo mail into it, but many users have a query that Yahoo Mail not syncing with Mac Mail on their Mac operating system. You can follow the below-required steps to resolve this:
1. On your Yahoo Mail app, choose 'Preferences.'
2. Then, select the Yahoo email account which you want to remove.
3. Now, click on the 'Dash' and then on 'OK.'
4. Confirm the deletion of your Yahoo Mail account.
5. Once your Yahoo Mail account is deleted, add the same Yahoo Mail into your Mac Mail and check if the Yahoo Mail not syncing on Mac issue is resolved.