Cubase 9 Won't load "Asiosetup YSdriver Extension"

Hey there,
Cubase 9 won’t load up and gets stuck at initializing stage while trying to load “Steinberg YSdriver Extension”.

Working on new macbook pro with sierra.
Iv’e installed this yamaha driver again, restart , and still getting this message.
Can’t figure out what is this ‘Extension’ and whats going on:(

Thanks, Adam

I have the same extension, but that is because its the driver for my yamaha mixer, do you have a steinberg interface or yamaha interface ?
perhaps if the device is not connected the extension wont load.

Hi…did you ever get this figured out? I’m having the exact same problem for two days now. Would love your input if you can solve this for me!!