OSX + UR44c, 2.0.5 / 3.0.5 drivers crash the system

I’ve got a UR44c on a 2018 mac mini via USB-C and the 2.0.5 driver on Catalina would crash the whole computer after a couple of days. Going back to 2.0.3 it was solid for months.

I recently updated it to Big Sur as Apple has been bothering me to for some months, 2.0.3 no longer works so with a sigh I installed 3.0.5 hoping it was actually stable given it’s been the latest release for some time.

No, it is not. My computer has crashed in the night after 2 days with the Yamaha USB driver front and centre in the crash log.

I’ve done a time machine backup, reinstall and restore of the whole computer, and it was stable before with 2.0.3 so I don’t think it’s the hardware.

Any ideas?

Thanks

1 Like

I have the same problem on macbook pro 2017 with big sur 11.1
2.0.5 and 3.0.5 periodically crash the system, but with 2.0.3 no crashes

here is last kernel extensions backtrace for crash

         com.apple.driver.usb.AppleUSBCommon(1.0)[6A5D1CE8-2016-3F4A-B7EB-C696354F9D15]@0xffffff80095e1000->0xffffff80095e4fff
         com.apple.iokit.IOUSBHostFamily(1.2)[A4EDF9D5-1A4C-35EA-A92E-88332B37F8D9]@0xffffff800ab5e000->0xffffff800abeafff
            dependency: com.apple.driver.AppleBusPowerController(1.0)[D1476993-053E-3169-BC6E-52C98F57801E]@0xffffff800918c000->0xffffff800918ffff
            dependency: com.apple.driver.AppleSMC(3.1.9)[D674490B-26E7-312B-9E8E-03250124CCC6]@0xffffff8009494000->0xffffff80094acfff
            dependency: com.apple.driver.usb.AppleUSBCommon(1.0)[6A5D1CE8-2016-3F4A-B7EB-C696354F9D15]@0xffffff80095e1000->0xffffff80095e4fff
            dependency: com.apple.driver.AppleUSBHostMergeProperties(1.2)[F2C4C493-4BFB-3427-AECB-8ED237D074F5]@0xffffff800ac59000->0xffffff800ac59fff
            dependency: com.apple.iokit.IOACPIFamily(1.4)[C8F0E837-965A-3EB4-B8F6-4C2142046028]@0xffffff800a2d7000->0xffffff800a2d8fff
         jp.co.yamaha.driver.YamahaSteinbergUSBAudio(3.0.5)[14BB8CBF-B8DF-3B7A-A942-63B94C066D9B]@0xffffff7faa02c000->0xffffff7faa053fff
            dependency: com.apple.iokit.IOAudioFamily(300.6.1)[5F231B4B-7E8C-3F8A-844B-CE489D7529C0]@0xffffff800a33a000->0xffffff800a357fff
            dependency: com.apple.iokit.IOUSBHostFamily(1.2)[A4EDF9D5-1A4C-35EA-A92E-88332B37F8D9]@0xffffff800ab5e000->0xffffff800abeafff```