Reset Apple Mail App Fonts

How to reset Font & Colors Settings in Apple Mail

A few weeks ago, I changed the default font settings in Apple Mail (Mail > Preferences > Fonts & Colors) to see if I’d like a different look. After changing the font around a bit, I realized that it’s not possible to set it back to the default font, San Francisco. After digging through some configuration files, I found out how to restore the default font without resetting the Mail app in its entirety.

The following steps may require an administrator account. This method has only been tested on macOS Catalina.

  1. Download Xcode from the Mac App Store (you can delete it after)
  2. In Finder, in the menu bar, select Go > Go to Folder…
  3. Type or paste ~/Library/Containers/com.apple.mail/Data/Library/Preferences then press Go
  4. Copy com.apple.mail.plist to a directory you have full permissions to (such as your Desktop)
  5. Rename com.apple.mail.plist to com.apple.mail.plist.old in the original directory
  6. Open com.apple.mail.plist (with Xcode) in the directory you copied it to
  7. Use Command + F to find all instances of the word “font”
  8. Hover over each row containing “font” and press the minus (-) button
  9. If you delete something else by mistake, use Command + Z to undo
  10. Save the file, then move/copy it back to its original location (if you closed the window, repeat steps 1-3)

If something goes wrong, repeat steps 1-3, delete com.apple.mail.plist, and rename com.apple.mail.plist.old to com.apple.mail.plist

Feel free to ask questions below.

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