MacOS – Option-Left/Right Arrow doesn’t work


The keyboard shortcuts Option-Left/Right Arrow is made for moving the cursor by words, as Apple described here: , but doesn't work on my MacBook Pro (15-inch, Mid 2010, OS X 10.11). They fail to work everywhere I can try, including but not limited to Notes, TextEdit, Mail, search field and iMessage text field. Meanwhile on my friend's MacBook Air (13-inch, Mid 2013, OS X 10.11), they work damn well! Anyone can help?


  1. An Apple Wireless Keyboard is paired to my Mac, but it doesn't help.
  2. System has been restarted several times, doesn't help.
  3. Including Option-Delete and Option-Shift-Up Arrow, all the Option related shortcuts in the "Document shortcuts" session of doesn't work.
  4. The Option key is fine, I have tested it by shortcuts like Command-Optiono-H which works.

Best Answer

The problem has been solved by switching the input source from "Unicode Hex Input" (my major input source) to "U.S.". I think some option based shortcuts can't function as usual with "Unicode Hex Input". You can update the input sources by searching "unicode" to be directed to system preferences -> Keyboard. Click "Input Sources" and remove other input methods that might be causing the error. Then open a new window for the program you want to test.