Apple Mail Vulnerability April 2021
We have received a security notification regarding Apple Mail on all Macs running versions of software older than macOS Mojave 10.14.6, macOS High Sierra 10.13.6, and macOS Catalina 10.15.5, including all versions of the macOS older than 10.13.
If you are running a vulnerable version of macOS, please update your Mac and reboot after doing so immediately. If you cannot update, please remove your email account from Apple Mail and consider using Outlook or Outlook Web Access until you can.