When you update the macOS software on your Mac, Mail will also be updated. See also: Email Attachments Won’t Open in Safari on Mac Update If restarting does not fix your problem, then try the steps below: Before you do anything, simply restart your Mac. After trying each step below, test Mail again to see if you can open it. See also: Mac Mail App Opens Itself Randomly, Fix
Mail opens without any issue but then crashes later on.This article explains how you can troubleshoot if the Mail app on your Mac keeps crashing when you want to open it. Several Mac users have said that Mail closes or quits unexpectedly.
