kIOUSBHostConnectionSpeedSuperPlusBy2 The connected device runs at 20 gigabits per second. DeclarationkIOUSBHostConnectionSpeedSuperPlusBy2 See AlsoGetting the Connection SpeedskIOUSBHostConnectionSpeedNonekIOUSBHostConnectionSpeedFullkIOUSBHostConnectionSpeedLowkIOUSBHostConnectionSpeedHighkIOUSBHostConnectionSpeedSuperkIOUSBHostConnectionSpeedSuperPluskIOUSBHostConnectionSpeedCount