Hello everyone. I'm using a 2015 Macbook Pro 15". I'm currently running El Capitan Public Beta 5. I have a OWC Thunderbolt 2 dock, which has all been well since the days of Yosemite until I used El Capitan. Initially it started off by telling me that the USB device is disabled whenever I tried connecting a mouse/keybord dongle, or even an external HDD via the dock. However, right now, whenever I plug in the dock into my thunderbolt hub, it crashes my computer. I have a Thunderbolt Ethernet dongle which does not give me similar problems. Am I the only one experiencing such problems?