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Interested in other thoughts about the difference between ThunderBolt Drivers. I have a Designare EX w/ the TB3 USBC DSL6540 Controller. In Ubuntu16.04 and Win10, hotswap works and all device detected. Yet in OSX, even with DSDT I can get all devices detected, yet they do not load appropriate `ThunderBolt Drivers`. Which are responsible for enumerating the attached devices and determining whether it is `PCI-HotPlugCapable`, among other things. Behavior of Thunderbolt from DSL6540 in OSX is radically different. Yet on a New Emoji-Bar laptop the same controller works perfectly. So there's obviously a missing component here. Perhaps Macbook Configures the ThunderBolt controller before the operating system, unlike Linux/Windows. The Most Documentation I have other than the Linux Source. https://developer.apple.com/library/content/documentation/HardwareDrivers/Conceptual/ThunderboltDevGuide/Basics01/Basics01.html Attached in example of Linux Source of Thunderbolt Drivers. http://elixir.free-electrons.com/linux/latest/source/drivers/thunderbolt/nhi.c