Thunderbolt Port Issue

Ray, this is what I see in 10.13.6 with nothing attached to the TB port...

Thunderbolt Bus:

Vendor Name: Apple Inc.

Device Name: iMac

UID: 0x0001000A19EB5380

Route String: 0

Firmware Version: 25.1

Domain UUID: 5FA81B72-48DF-FC50-9599-F002FFF765ED

Port:

Status: No device connected

Link Status: 0x7

Speed: Up to 10 Gb/s x2

Receptacle: 1

Port Micro Firmware Version: 2.1.3

1. Shut the machine down.

2. UNPLUG the power lead to the computer and any firewire/USB drive or other devices.

3. leave it for 10 minutes.

4.Hold power button in for 5 seconds.

5. Connect back up and reboot.

Drivers would be under Extensions

My Mojave 10.14.6 Macbook Pro 15" shows similar output to BDAqua

When I plugged in my iPhone via a USB-C to Lightning cable, the iPhone shows up under USB

When I plugged in a compact Thunderbolt 3 adapter (HDMI or VGA, Ethernet, USB3), with just Ethernet and USB being used, they both showed up under USB. I did not have a video monitor to plug in, so I don't know where they would show up.

I have a USB 3.1 Gen 2 SSD with Type-C connector and it too showed up under USB as well.

So I Screen Shared into work, where I have a CalDigit Plus Thunderbolt 3 adapter on my work Mac, and there I did find a Thunderbolt 3 device

Did you try this yet?

1. Shut the machine down.

2. UNPLUG the power lead to the computer and any firewire/USB/Thunderbolt drive or other devices.

3. leave it for 10 minutes.

4.Hold power button in for 5 seconds.

5. Connect back up and reboot.

Do you have 3rd party drivers that you are talking about? Or you are assuming you lost the Apple drivers? I find it hard to believe the standard Mojave install would lose the Thunderbolt drivers. Besides if you have not Thunderbolt 3 drivers, then how did System Information know there was nothing attached, if it did not have a driver to query for that information?

This is what my Late 2016 15" Macbook Pro Mojave 10.14.6 system with 4 Thunderbolt 3 ports says about my Thunderbolt devices (and this is the same display when I've had devices plugged into my Thunderbolt 3 ports). This is Not my work Mac that provided the other screenshot

This screenshot never changed even when I had a USB-C external SSD, my USB-C to Lightning cable for my iPhone, a 4 portThunderbolt 3 dock (~$50) that has Ethernet, USB3 and video port.

None of them triggered the Thunderbolt System Information.

The previous screenshot that shows something attached to my Thunderbolt 3 ports was from my work Mac. It has the much more expensive 15 port CalDigit dock ($250) and that is when I saw something being attached to my Thunderbolt 3 ports.

So I'm not sure you are not seeing drivers for your Thunderbolt 3 ports.

Besides, I would expect to see the drivers listed under Software -> Extensions.

So lets get down to specifics. Is there a problem you are trying to work out and you are assuming it is a lack of drivers, or are you just looking at things and thinking something is wrong.

Maybe if we knew the problem, we could suggest something.