- macOS 10.0+
The value of this property should be the id of a subclass of
NSCell, which can be obtained by sending the
class message to either the
NSCell subclass object or to an instance of that subclass. The default cell class is that set with the class method setCellClass(_:), or
NSAction if no other default cell class has been specified.
You need to use this property only with matrices initialized with
init(frame:), because the other initializers allow you to specify an instance-specific cell class or cell prototype.