IOClass
The name of the class to instantiate from your driver.
Discussion
The value of this key is a string that contains the name of a custom IOService subclass in your driver. When the system successfully matches one of your driver’s personalities to a device, it instantiates the class in this key and calls its start method.
For the personalities in a DriverKit extension, specify the value IOUserService unless otherwise directed by the documentation. For example, the IOUserHIDEventService class expects you to specify the value AppleUserHIDEventService.