I have a MacPro 5.1 running OSX 10.11.3.
• The UR22 MKII are updated to firmware 1.0.2
• The Yamaha Steinberg USB Driver 1.9.8 is installed.
The OSX recognize the UR22 MKII and work, but the sound volume control in Finder are grey. It is NORMAL?
If I restart and boot in Windows 10 with USB driver 1.9.8 installed, it recognize the hardware and work. And Sound Volume Control in Windows works as spected.