One of the new featuers in macOS Sierra are tabs in more apps, including Mail.

How do I use tabs in Mac Mail? Clicking "View", "Show tab bar" displays a bar with one tab, but I can't find a way to open a new tab.

  • New Tab is normally Cmd/T [don't have sierra to test]
    – Tetsujin
    Sep 26, 2016 at 9:23
  • 3
    Cmd-T opens the Font Selector in Mail :-)
    – nohillside
    Sep 26, 2016 at 9:25

3 Answers 3


For tabs to work in all situations, you need to enable them in System Preferences->Dock (set the appropriate option to "always"). Afterwards, you can (in Mail) select "File -- New window" or press Opt-Cmd-N to create a new tab.

  • This doesn't work, it opens a new window, and not a new tab.
    – Flimm
    Sep 26, 2016 at 14:01
  • 1
    It does work for me. Did you set the tab option to "Always" in System Preferences->Dock?
    – nohillside
    Sep 26, 2016 at 14:04
  • I had it set to "in full-screen only". Thanks.
    – Flimm
    Sep 26, 2016 at 14:12
  • 1
    Is there a way to open a Tab without setting the System Preference mentioned? I would like to be able to open a Tab in Mac Mail on demand, like I can in most/all web browsers.
    – wodow
    Aug 9, 2018 at 9:59
  • 1
    @wodow Not that I'm aware of.
    – nohillside
    Aug 9, 2018 at 10:17

If you hold down option while selecting File > New Viewer Window, a new viewer tab will be created regardless of any Dock System Preference setting.


Not sure if your question was ever answered but all you have to do is use "option-command-n" to create new tabs on the tab bar the other shortcut, "command-n" just creates a new email window. if you hit again command-n it'll create a tab inside the new email window! Both commands are shown under the "file" menu However tabs will only open if you've selected "use tabs when opening new docs- always" under dock preferences (system preferences/dock)

  • 1
    I am curious why you think there is doubt about the question being answered, since there is an answer from a year ago from Patrix which is marked as an answer by the person who posted the question and has 10 next to it. Does that answer not appear on the interface you are using to participate here?? Oct 17, 2017 at 17:35

You must log in to answer this question.

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