Often even if the manufacturer specific driver is available when connected to a device which don't allow driver downloads into the operating system (for example iOS devices), the product will still work as a class compliant USB device.

To add a new external MIDI device, click the Add button in the MIDI Studio toolbar. Enter a name for the new configuration, then click OK. In the MIDI Studio window, click the Choose MIDI Configuration pop-up menu (it may show Default), then choose New Configuration. So if you purchase a MIDI or Audio interface you should always check the product manual and manufacturer's website to see if there is a dedicated USB driver for your product that provides added functionality. In the Audio MIDI Setup app on your Mac, choose Window > Show MIDI Studio. Also many audio interfaces are also MIDI interfaces and audio and MIDI travel over the USb cable. Download Yamaha USB MIDI driver v1.5.0 here. These features are only available if you download the driver from Yamaha's website. This MIDI driver supports Mac OS 11 Big Sur and Apple Silicon.

Because data transfer on USb is much faster than 5 pin DIN it is possible to have multiple ports of MIDI (a port is a group of 16 MIDI channels) on a single USB cable. The dedicated Yamaha USB Driver provides for 8 ports of high speed USB, includes the names of all the devices that are compatible with the driver and has some routing capabilities. But often manufacturer specific drivers provide added functionality. Class compliant drivers are convenient because you don't have to download any external software.

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