Technical Q&As

Q Is there a way to merge multiple USB class drivers into a single Code Fragement file to support multiple USB devices?

A For the current releases of Mac OS USB to v1.0.1, there is no support for multiple class drivers merged into a single file. The USB driver loading mechanism only identifies the first driver listed in the 'cfrg' resource. We are investigating a modification to the driver loading mechanism which may support merged driver fragments. When this change occurs, this Q&A will be updated and notice will be posted to subscribers on the USB mailing list. For information on the USB mailing list, go to the Mac OS USB Developers web site.