1

Prior to Yosemite, setting the following invisible preference would cause Mail.app to show duplicate messages rather than its default behavior of hiding them:

% defaults write com.apple.mail AlwaysShowDuplicates -bool true

This no longer seems to have any effect in Yosemite (OS X 10.10). Does anyone know of an alternate method to achieve this?

  • Out of curiosity, why would you want this? – Harv Oct 22 '14 at 17:06
  • My company has a tight quota on email. Having duplicate messages with large attachments without my knowledge is detrimental to my staying under that quota. – Eric S. Oct 22 '14 at 18:36
  • Oh and BTW, there is a bug related to this: you cannot drag and drop any message that's hiding a duplicate into a new message as an attachment. Having the mails displayed individually avoids this problem. – Eric S. Oct 22 '14 at 18:38
  • Three years later and this silly bug still exists in High Sierra. So I continue to use this invisible preference, and just filed a bug with Apple. Not that other folks can access it, but it's #35594362. – Eric S. Nov 16 '17 at 20:50
4
defaults write com.apple.mail _AlwaysShowDuplicates -bool true

This should be working.

  • I don't know who voted this down, but this does indeed work for me on Yosemite! – Eric S. Oct 28 '14 at 13:15
  • It works on El Capitan too. – Akira Okumura Sep 15 '16 at 3:32
  • It works on macOS Sierra (10.12) too. – John Pang May 17 '17 at 17:04

You must log in to answer this question.

protected by Community Jan 15 '15 at 2:29

Thank you for your interest in this question. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).

Would you like to answer one of these unanswered questions instead?

Not the answer you're looking for? Browse other questions tagged .