I have accidentally flagged all my emails. How do I unflag them?

SAVED MY LIFE haha THANKS that helped.

I had this same issue. Here's what worked for me: Connect your iPhone to your computer. Open Mac Mail. In the mailboxes sidebar there's a Flagged section. Select all of the emails in there, right click, and in the flags section click the "X"/Clear flags.

Open a Finder window.

Select Go. | Go to Folder ,from the menu.

Type "~/Library/Mail

You can see V2 may be V4 folder including your all of your mail.Please check the permission of these folders using right click go to "get info" then you can see the sharing and permission options .There is a yellow lock by clicking on the lock promit credentials ,give your credentials for unlock .Please give permission to the particular user by adding the + symbol and select the user and click on the setting symbol button "Apply to enclosed items". Then go to mail and select all mails you have flagged ,Right click on all selected mail click on "Clear flag".

This does not work. Mark Move Trash are all greyed out when you click edit

I can only tell you what works for me. If the above technique doesn't work. Slide the email to the left, tap more, tap unflag.

Best Answer worked flawl