I am using OS X El Capitan 10.11.3 on a variety of Mac Minis and Macbook Pro and try to connect to Phidget 1065 DC Motor controller(s). I installed the latest available drivers for Phidget_2.1.8.20160104. After a power-down/boot up, it seems the Phidget is correctly detected, but when double-clicking the item in the Phidgets Preference Panel it does not show anything (and cannot be controlled from my application). The detailed info and controls only appear after a physical USB unplug-plug reconnect, and then re-clicking the item in the Phidgets Preference Panel. I can replicate this behavior by using kextunload / kextload of the phidgets driver while a Phidgets device is already plugged -- only after hotplugging the device is correctly discovered.
Can anyone confirm this behavior? Does this require a driver update? I can imagine a workaround with 'unloading' the entire IOUSBFamily tree but this would be quite a task.