having the same issue on swift 6 macos 15.1 xcode 16.0 beta4

figure it out    public func textView(_ textView: NSTextView, shouldChangeTextIn affectedCharRange: NSRange, replacementString: String?) -> Bool { if replacementString == "K" { return false } return true }

after a system update, it works, closed

Same issue, haven't found any answer yet.

I found a similar case here How can I remove Textfield focus when I press return or click outside Textfield? (SwiftUI, MacOS) - https://stackoverflow.com/questions/58987542/how-can-i-remove-textfield-focus-when-i-press-return-or-click-outside-textfield，with the following code swift    func onCommit() - Void {     DispatchQueue.main.async {       NSApp.keyWindow?.makeFirstResponder(nil)     }   } It's almost what I want, except that, after I press return key, I can see the selection flash and quickly disappear.