Toggle language by pressing Shift + Command I've moved from PC to Mac and I'm used to pressing Shift + Ctrl, while on Mac I have to press Ctrl + Space. This is a bit frustrating (probably because I've only used it for 2 days), so I opened System Preferences > Keyboard > Shortcuts and tried to change the shortcut to Shift + Command and for some reason it refuses to change. 

I tried to test some other shortcuts such as Command + Z and it works fine. I'd still like to change it to Shift + Command. Is there a way I can achieve this?
With freshest version (11.4.0 at 13.12.2017) of Karabiner Elements and Cmd + e for previous language source:



You can put this json gist to ~/.config/karabiner/assets/complex_modifications/&lt;filename&gt;.json, add gist rule in Karabiner Elements Preferences -&gt; Complex Modifications -&gt; Rules -&gt; Add rule and Enable Languages -&gt; Command + Shift to Command + e.



This will remap Cmd + Shift to Cmd + e and you can change language source by Cmd + Shift.