USB Mass Storage Support 1.3.5 is a rigid of USB Mass Storage Class drivers written by Apple Computer to sustain USB Mass Storage Class devices. USB includes the opinion of Class drivers, a rigid of software components generally delivered by Operating System vendors that are able to communicate with not just one, but many different USB devices of a finicky kind. This enables any number of compliant devices to be plugged in and start working immediately without the beggary to install additional software. Several Class Drivers are already included in Mac OS for its computers with USB, including a hub class driver and a composite class driver. Over time, Apple expects to offering new and updated Class drivers for USB. The Mass Storage Support software represents one of these class drivers and is intended to sustain devices that meet the USB Mass Storage Class specification.