Some people have noticed connectivity issues with the Apollo Twin audio interface from Universal Audio, and Elgato Thunderbolt™ Dock.
Currently, UAD-2 software is not yet compatible with OS X 10.10 Yosemite. This is most likely the cause of these issues.
Universal Audio is currently working on support for OS X 10.10 Yosemite.
For more information about this Thunderbolt™ hardware device, see:
http://www.uaudio.com/interfaces/apollo-twin.html
Currently, UAD-2 software is not yet compatible with OS X 10.10 Yosemite. This is most likely the cause of these issues.
Universal Audio is currently working on support for OS X 10.10 Yosemite.
For more information about this Thunderbolt™ hardware device, see:
http://www.uaudio.com/interfaces/apollo-twin.html