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 experiment with a different look. After changing the font around a bit, I realized that it’s not possible to restore the default font, San Francisco (referred to as “System Font”). 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/ then press Go
  4. Create a copy of and rename it to (this will serve as a backup)
  5. Move to a directory that you have full permissions to such as your Desktop
  6. Open (with Xcode)
  7. Use Command + F to find all instances of the word “font”
  8. Hover over each row containing “font” and press the minus (-) button to delete it
  9. If you delete something else by mistake, use Command + Z to undo
  10. Save the file, then move it back to its original location (if you closed the window, repeat steps 1-3)

All the erased lines should be recreated by macOS with their default values and the “System Font” option should be restored. If something goes wrong, repeat steps 1-3, delete, and rename to

Feel free to ask questions below.

Edited 5/10/21 to improve clarity.


Baptiste March 30, 2021 Reply

You saved my life !! Thank you very much.

KP August 4, 2021 Reply

Thank you!

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