Since I installed High Sierra I sometimes have to double tap Command + Space to open spotlight search bar. This problem is weird because it happens randomly. Say I just double tapped Command + Space, it won't happen again for a couple minutes.

I haven't setup any shortcut nor I use any app that steals this shortcut. I have no idea what is going on and it is really boring, cause sometimes I'm in a text editor, tap Command + Space, nothing happens but as I'm used to it, I start type right away and mess up my code.


I had the same problem. Apparently, Siri is waiting to see if it's being called. In the Siri preferences, there's a setting for Keyboard Shortcut which is set to Hold Command Space by default. So sometimes you might be pressing a little longer but not long enough for Siri to kick in.

Change this setting to Press Fn (Function) Space as shown in the screenshot.

Change Siri Keyboard Shortcut

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  • 4
    I'll be forever grateful for this and I'll tell my grandchildren the story of a man who once saved my life! – Luiz K. Apr 7 '18 at 22:01
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    I was ready to reload my MacBook Air since I assumed this was just a performance issue. THANK YOU! – furtive Jul 6 '18 at 21:56

Look in SystemPreferences->Keyboard->Shortcut select Spotlight (while Textedit open) if there is a message that CMD+Space is "used by another app".

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