This document covers the essential technical details, installation notes, and compatibility constraints for this specific keyboard model. 1. Executive Summary The Yamaha PSR-295 is a legacy Portable Keyboard (circa 2005). Unlike modern USB-MIDI devices that are "Class Compliant" (no driver needed on Mac/macOS or Windows 10/11), the PSR-295 requires a legacy proprietary driver to communicate MIDI data over its USB port with Windows operating systems.