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USB C ports only work for power

I have a Macbook Pro 16 inch 2019.


All 4 of my usb c port work for my power cord but any adapters do not work. I have run a diagnostic test and tried to reset the SMC and a soft reset. Nothing is working. Any suggestions?

Posted on Jun 20, 2022 2:31 PM

Reply
Question marked as Top-ranking reply

Posted on Jun 20, 2022 5:21 PM

smmohs wrote:

I have a Macbook Pro 16 inch 2019.

All 4 of my usb c port work for my power cord but any adapters do not work. I have run a diagnostic test and tried to reset the SMC and a soft reset. Nothing is working. Any suggestions?


The charging cable is just that a charging cable...only it will do low level data-transfer speed limited to 480Mbps (USB 2.0) and it doesn't support video.


for your intel 16" Four Thunderbolt 3 (USB-C)

https://www.apple.com/https://www.owcdigital.com/products/thunderbolt-4-usb-c-cable


About the Apple Thunderbolt 3 Pro Cable - Apple Support





the 16" M1 includes 3 - Thunderbolt / USB 4 (Thunderbolt 4 up to 40 Gbps, USB 4 up to 40 Gbps)

https://www.owcdigital.com/products/thunderbolt-4-usb-c-cable


Thunderbolt 4 Pro Cable (1.8 m) - Apple




Do you have a USBC thunderbolt cable to test external peripherals...

What peripherals are you testing?







9 replies
Question marked as Top-ranking reply

Jun 20, 2022 5:21 PM in response to smmohs

smmohs wrote:

I have a Macbook Pro 16 inch 2019.

All 4 of my usb c port work for my power cord but any adapters do not work. I have run a diagnostic test and tried to reset the SMC and a soft reset. Nothing is working. Any suggestions?


The charging cable is just that a charging cable...only it will do low level data-transfer speed limited to 480Mbps (USB 2.0) and it doesn't support video.


for your intel 16" Four Thunderbolt 3 (USB-C)

https://www.apple.com/https://www.owcdigital.com/products/thunderbolt-4-usb-c-cable


About the Apple Thunderbolt 3 Pro Cable - Apple Support





the 16" M1 includes 3 - Thunderbolt / USB 4 (Thunderbolt 4 up to 40 Gbps, USB 4 up to 40 Gbps)

https://www.owcdigital.com/products/thunderbolt-4-usb-c-cable


Thunderbolt 4 Pro Cable (1.8 m) - Apple




Do you have a USBC thunderbolt cable to test external peripherals...

What peripherals are you testing?







Jul 18, 2022 8:23 AM in response to smmohs

If the charger works, but data devices do not work, then there is a hardware issue with the laptop....most likely the Logic Board will need replaced. Power & data are two separate things on these USB-C Macs. One may work while the other won't work. Make sure to try connecting the devices directly to the Mac since some adapters, docks, & hubs may have compatibility issues with some devices.


macOS already has great built-in security, but you must also do your part to keep your Mac clean & safe. Those anti-virus apps, cleaning apps, and third party security software do nothing more than interfere with the normal operation of macOS which can cause all sorts of issues. Here is an article a well respected forum contributor has written which has some great tips for safe computing practices:

Effective defenses against malware and other threats - Apple Community



Jul 18, 2022 7:34 AM in response to KenRodemann

KenRodemann wrote:

My 2017 MacBook Pro 15" also just started this behavior. I can charge my Mac with the power adapter in my USB-C ports, but my mouse and keyboard no longer work in any of the 4 ports. I am currently running an AVG deep scan to see if there are any viruses that might be affecting my Mac.

Uninstall AVG and any other third party app that claims to clean, protect, manage, boost performance, etc. These apps use system resources while providing no benefit. They interfere with the operating systems built in systems and they may cause problems.

USB C ports only work for power

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