After following the steps in:

How can I undo these settings?

How can I set Mail.app back to being the default mailto: protocol handler?

I tried unsetting the mailto: protocol in chrome://settings/handlers, but the only result is that now mailto: links don't open at all. (They still switch focus to Chrome.)

According to this answer, the file that needs to be edited is ~/Library/Preferences/com.apple.LaunchServices.plist. However, checking the file contents with the file command shows that it is a binary file:

$ file /Users/(me)/Library/Preferences/com.apple.LaunchServices.plist
/Users/(me)/Library/Preferences/com.apple.LaunchServices.plist: Apple binary property list

What else can I try?

(I am running Mac OS 10.7.4.)

  • I wouldn't suggest mucking with LaunchServices unless you know exactly what you're doing. Also, mailto is a protocol already handled by the system. The question you linked was about defining new protocols.
    – tubedogg
    Sep 22, 2016 at 5:26

1 Answer 1


In the General pane of Mail settings, there should be an option for setting the default mail client.

  • While you definitely answer the question, providing more information (such as what the setting is called or a screenshot) would flesh out your post.
    – tubedogg
    Sep 22, 2016 at 5:24
  • D'oh! I didn't think to check there. Of course, Apple. Why wouldn't a system-wide default be set from a single application's preferences pane? Makes perfect sense. (@tubedogg, that really is all the info needed to find the setting.)
    – Wildcard
    Sep 22, 2016 at 6:14

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