How to activate macOS default spellchecker

Grammarly for Mac automatically turns off the macOS standard spellchecker when it’s installed. If you prefer to keep your macOS spellchecker on, please follow these steps: 

1. Open Finder and click Go. 
2. Select Utilities and open Terminal.
3. Paste the following command into the Terminal window, then press Enter:
   
   defaults write -g NSAllowContinuousSpellChecking -bool true
   
   
4. Restart your computer for the change to take effect.