When clicking on a button, I\'d like to display a sheet with an email+password prompt with options to save and cancel. The UI is all set up, the actions are in place, and th
The view does not absolutely have to have a title bar.
See Why NSWindow without styleMask:NSTitledWindowMask can not be keyWindow?
Which states: If you want a titleless window to be able to become a key window, you need to create a subclass of NSWindow and override -canBecomeKeyWindow as follows:
- (BOOL)canBecomeKeyWindow {
return YES;
}
This worked for me.