Hello,
We have released a new Yamaha Steinberg USB Driver v1.9.7 addressing the audio-dropout issues that occurred on Mac OS X 10.11.1 (El Capitan).
Please find the driver on the download page!
This driver is compatible with all UR Series and CI Series devices. If available, make sure to have the latest “TOOLS for UR” or “TOOLS for CI” installed for your device prior to the installation of the new driver.