Our iOS and macOS device, whether MacBook Air, iMac, MacBook Pro, iPhone or iPad, has a default email manager with the name Mail. In this email manager we can link virtually any of your email accounts (1 or more) to receive, open and read, all the emails you receive in these email accounts, regardless of the email service you use: Gmail, Yahoo, Outlook, hotmail, etc.
This way all your emails will be concentrated in a single app from which you can not only open the messages received in each of the trays of the Mail accounts that you have added, but you can also answer, forward or write any email from the email account you want.
You should know that the iOS and macOS Mail app allows you to manage all emails from a common or general inbox, while if you prefer you can access the email inboxes of each of the added email accounts, as well You can do it individually.
Regardless of how you use the default macOS Mail app, in many cases a large number of unread emails accumulate, which is reflected in the number shown in the Mail app icon in the form of red balloon. This number will indicate the total number of emails received in each and every one of the email accounts that we have linked in the Mail app.
Obviously if we want the number of unread emails to decrease in our devices, we can do so just by reading each and every one of the received emails; however, this may take a lot of our time, especially since many of the emails have already been read on your computer or other devices.
Another solution, which we recommend, especially for being much faster, direct and automatic, is to mark the emails read from the default app Mail. If you want to know how to do it, here’s how to do it.
Mark all emails as read in the default Mail app on macOS devices MacBook Air, MacBook Pro, and iMac running macOS High Sierra
The first thing we will have to do is open our Mail app. you can do it by running it from MacBook dock. Or
you can also open Mail app on your MacBook device using spotlight search. to do that, just open up the spotlight search and type “mail” and press enter.
it will now open your default macOS email app, where you will see, all of your added email accounts.
In front of your email account name you will see the number of unread or checked email’s. Here you will find the different email accounts linked in the app. Therefore we will have to select the account from which we want to mark as read your emails.
Now, to mark all emails as read or unread, you have to click on the email account, on which you want to perform this.
Now just click on Mark all messages as read.
It should be noted that in the case that you have a large number of unread emails, you may need several seconds until all changes are made and all emails are read as read. Also in cases of the number of emails is very high, you may have to perform this operation several times so that each time you do reduce the number of unread mail until the number is zero.