Hi everyone — hoping someone can help confirm what’s going on here or offer any last ideas before I take it in.
---
### 🔹 Background
For three full days after moving, I used my **MacBook Pro (Intel)** completely standalone —
**no charger, no hubs, no peripherals attached at all** — and everything worked perfectly.
Once I reconnected my setup, **none of my USB ports would recognize data devices anymore.**
---
### 🔹 The Issue
- When I plug in **any USB-C hub or extender**, their **LED lights turn on**, so power delivery is fine.
- **Low-power devices** (like a fan or iPhone) **work** — they power or charge as expected.
- **Data devices** (USB keyboard, external drives, etc.) **don’t work at all** — not detected in Finder, Disk Utility, or System Information.
- I’ve tested **three different hubs** (both powered and unpowered) across **all USB-C ports** — same exact result each time.
- I can’t test drives or keyboard directly because they’re **USB-A only**, so I have to use a hub.
---
### 🔹 What Makes It Even Stranger
- If I connect my **external monitor through HDMI on the same hub**, the **display works perfectly.**
→ So the hub’s Thunderbolt/DisplayPort video path is alive.
- The Mac **charges normally**, and **DisplayPort video** through USB-C or HDMI **works fine** — proving power and video lanes are intact.
- It’s *only the USB data portion* that’s completely dead.
---
### 🔹 Diagnostics & Results
I ran several terminal commands to confirm:
**`system_profiler SPUSBDataType`**
> No USB devices detected.
**`ioreg -p IOUSB -w0 -l | grep -i "Voltage"`**
> (no output)
**`ioreg -p IOUSB -w0 -l | grep -i "CurrentAvailable"`**
> (no output)
**`system_profiler SPThunderboltDataType`**
> Shows both Thunderbolt buses (Bus 0 and Bus 1) as healthy, but with “No device connected.”
> Each bus reports firmware version 63.5, link controller 1.43.0, and “Speed: Up to 40 Gb/s.”
So Thunderbolt itself seems fine, but USB devices aren’t enumerating at all.
---
### 🔹 What I’ve Already Tried
- SMC reset ✅
- NVRAM reset ✅
- Booted into macOS Recovery ✅
- Confirmed all hubs and drives work fine on another machine ✅
- macOS reinstall failed due to low space (currently clearing storage)
- Tried every port and hub configuration — no difference
---
### 🔹 What This Appears To Be
At this point:
- Power delivery ✅ Works
- DisplayPort / HDMI video ✅ Works
- USB 2.0 / 3.x data ❌ Dead
That pattern means the **Thunderbolt/USB4 controller is alive**, but the **USB data lanes inside it have failed or are electrically hung**.
SMC and NVRAM resets didn’t help, so this points to a **hardware-level USB controller failure on the logic board**, not a firmware issue.
---
### 💡 What I’m Asking
Has anyone seen this before — where:
- All ports still deliver power and video,
- But **no USB data devices** work (across multiple hubs and ports),
- And all resets and reinstalls fail to fix it?
If so, did replacing the **logic board** or **Thunderbolt controller** restore USB data?
Also curious if anyone’s found success with a **Thunderbolt dock that has its own controller chip** (like the CalDigit TS4 or OWC Thunderbolt Dock), since that might bypass the dead internal USB data path.
---
**System info:**
- MacBook Pro (Intel)
- macOS “Tahoe”
- All ports tested
- Three different hubs
- iPhone charges, monitor works via HDMI, but drives and keyboard not recognized
Thanks for reading — and for any advice or confirmation.
At this point, it looks like a partial USB controller failure, but I’d love to be sure before taking it in.
— **Sergio**
---
### 🔹 Background
For three full days after moving, I used my **MacBook Pro (Intel)** completely standalone —
**no charger, no hubs, no peripherals attached at all** — and everything worked perfectly.
Once I reconnected my setup, **none of my USB ports would recognize data devices anymore.**
---
### 🔹 The Issue
- When I plug in **any USB-C hub or extender**, their **LED lights turn on**, so power delivery is fine.
- **Low-power devices** (like a fan or iPhone) **work** — they power or charge as expected.
- **Data devices** (USB keyboard, external drives, etc.) **don’t work at all** — not detected in Finder, Disk Utility, or System Information.
- I’ve tested **three different hubs** (both powered and unpowered) across **all USB-C ports** — same exact result each time.
- I can’t test drives or keyboard directly because they’re **USB-A only**, so I have to use a hub.
---
### 🔹 What Makes It Even Stranger
- If I connect my **external monitor through HDMI on the same hub**, the **display works perfectly.**
→ So the hub’s Thunderbolt/DisplayPort video path is alive.
- The Mac **charges normally**, and **DisplayPort video** through USB-C or HDMI **works fine** — proving power and video lanes are intact.
- It’s *only the USB data portion* that’s completely dead.
---
### 🔹 Diagnostics & Results
I ran several terminal commands to confirm:
**`system_profiler SPUSBDataType`**
> No USB devices detected.
**`ioreg -p IOUSB -w0 -l | grep -i "Voltage"`**
> (no output)
**`ioreg -p IOUSB -w0 -l | grep -i "CurrentAvailable"`**
> (no output)
**`system_profiler SPThunderboltDataType`**
> Shows both Thunderbolt buses (Bus 0 and Bus 1) as healthy, but with “No device connected.”
> Each bus reports firmware version 63.5, link controller 1.43.0, and “Speed: Up to 40 Gb/s.”
So Thunderbolt itself seems fine, but USB devices aren’t enumerating at all.
---
### 🔹 What I’ve Already Tried
- SMC reset ✅
- NVRAM reset ✅
- Booted into macOS Recovery ✅
- Confirmed all hubs and drives work fine on another machine ✅
- macOS reinstall failed due to low space (currently clearing storage)
- Tried every port and hub configuration — no difference
---
### 🔹 What This Appears To Be
At this point:
- Power delivery ✅ Works
- DisplayPort / HDMI video ✅ Works
- USB 2.0 / 3.x data ❌ Dead
That pattern means the **Thunderbolt/USB4 controller is alive**, but the **USB data lanes inside it have failed or are electrically hung**.
SMC and NVRAM resets didn’t help, so this points to a **hardware-level USB controller failure on the logic board**, not a firmware issue.
---
### 💡 What I’m Asking
Has anyone seen this before — where:
- All ports still deliver power and video,
- But **no USB data devices** work (across multiple hubs and ports),
- And all resets and reinstalls fail to fix it?
If so, did replacing the **logic board** or **Thunderbolt controller** restore USB data?
Also curious if anyone’s found success with a **Thunderbolt dock that has its own controller chip** (like the CalDigit TS4 or OWC Thunderbolt Dock), since that might bypass the dead internal USB data path.
---
**System info:**
- MacBook Pro (Intel)
- macOS “Tahoe”
- All ports tested
- Three different hubs
- iPhone charges, monitor works via HDMI, but drives and keyboard not recognized
Thanks for reading — and for any advice or confirmation.
At this point, it looks like a partial USB controller failure, but I’d love to be sure before taking it in.
— **Sergio**
