4/13/2023 0 Comments High sierra clean installIn fact, you should install macOS onto an external drive and boot off of that instead of wiping the drive. The very first thing that should be invoked long before you reinstall the or do any sort of firmware patching is to run Apple Hardware Test (Hold D while booting). Upgrading/downgrading firmware is not going to work if it can’t find the device which to apply the update. Even if the firmware was corrupted, your system would report an “unknown device” because something would be there, it just can’t identify what it is. I’m almost positive that it's a firmware issue as per the system does not see any thunderbolt firmware. It could be the Thunderbolt controller or the associated circuitry, but in the end, it has failed to the point where the system doesn’t see it. Now, if a previously functional device suddenly is no longer detected, the device has failed. webcam displays pictures and captures sound) Your Thunderbolt subsystem has failed Hardware is functional when a driver(kext) is loaded and the device can be used by the system to do whatever it’s designed to do (i.e. It’s identified by these numbers at such-and-such and address.” That’s a very simplistic description of what happens but it encapsulates the concept. When something is detected, the system says “I found this piece of hardware. Hardware can be detected and non-functional, but it is impossible for it to be functional without being detected. When it comes to hardware, there are two “conditions”
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