Not wanting to wait for the OTA update to appear on it's own, I downloaded the 5.0.1 OTA update directly and tried to do a adb sideload from my Mac but sadly I get a "device not found" after doing the adb reboot bootloader command. I do adb devices and indeed no devices are attached. So I entered recovery mode and still no device found and so I just start the Nexus 6 back up as normal. At that point, adb devices shows the Nexus 6 and so rinse and repeat - the device is not found while in bootloader. Must be doing something wrong since I was able to install 5.0 without any issue and it's already unlocked.