Aggregate Device Not Visible in Device Setup (Mac)

The aggregate device I created in Mac Yosemite does not appear in the Device Setup dialog box. When I reboot Yosemite and restart Cubase 8, but it does not detect a new device.

What would cause this to happen?

?Yosemite maybe? It’s working here on 10.9.5 using Soundflower to link Cubase and PT. No reboot required.

Is it just this one aggregate driver or any of them that you create?

When I opened Cubase today, it saw an new device, the aggregate device, and everything is working. I have no idea why.

I had restarted Cubase several times, and rebooted my computer too, but it never detected the new device before. Now all is good. Thanks.