cocoa - Completely disable NSTextView spell checking

Question

How can I disable spell checking for an NSTextView? In particular, the red lines that are automatically drawn. I know about the "Continuous Spell Checking" option in Xcode, and every option I have found in the documentation related to spell checking doesn't seem to take the red lines away.

Answer 1

Select NSTextView (doubleClick in IB on it because NSTextView is in NSScrollView by default or select it in Document Outline) and go to Attributes Inspector -> Linguistics -> and uncheck Continous Spell Checking here:

Result: