Apple’s security has progressively locked down kernel extensions (kexts). For macOS 10.15 Catalina and newer, Yamaha’s legacy driver will likely fail.
A: Apple Silicon Macs require native ARM64 drivers. Yamaha has not updated the legacy driver. Use a 5-pin MIDI interface instead. Yamaha Psr S500 USB Midi Driver
Whether you are triggering VSTs, recording your band’s demos, or teaching MIDI fundamentals, the PSR S500 remains a reliable, expressive controller. The driver is simply the bridge. Now go build that bridge and make music. recording your band’s demos