Since updating to macOS Sierra, many apps fail to respond correctly to Command+Tab switching.

For example, if the three most recent apps are any two other apps A and B and C, in the order A B C, Command+Tab from A briefly shows B, and then immediately switches to C.

Examples of B that exhibit this behavior include non-Apple apps (e.g. TextWrangler) as well as Apple apps (e.g. Messenger). Changing at least some apps to full screen causes them to behave correctly.

"Manually" switching by holding Command+Tab and selecting B fails in the same way.

  • I cannot reproduce the behavior you've described, so the only thing I can offer is to suggest submitting feedback and or a bug report. See apple.com/feedback/macosx.html & developer.apple.com/bug-reporting Oct 15, 2016 at 15:33
  • 2
    I can reproduce this; 1) Open Chrome and Terminal. 2) Close both application windows and leave both apps open in the background. 3) Open Chrome 4) Put Chrome in Full Screen Mode 5) Use Command+Tab to select Terminal 6) You'll be returned to the first desktop space and Finder will be in focus, requiring you to use Command+Tab again to use the Terminal. I fully agree this is a bug. Nov 13, 2016 at 6:21
  • See this question.
    – dinkelk
    Sep 20, 2017 at 1:17
  • 1
    ^ force stopping the dock from the Activity Monitor seems to fix the problem.
    – dinkelk
    Sep 20, 2017 at 1:18


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