I have my Flagged emails inbox in Mail with over 10,000 accidentally flagged emails from before a certain date. I want to click below them and select them and unflag them. But I haven't found a quick way to do this yet. Can anyone provide help?
Open Mail
Click on the "Flagged" option. It is to the right of the "Sent" option.
Once you have clicked the "Flagged" option, Command+A. This will highlight all the flagged emails.
Next, right click on the highlighted flagged emails. You should see an x (which is the clear flags) option. Click it, and it will remove the flags from the emails.