Why are my M4 MacBook Pro USB-C ports not working?

Question

Paul Colin1 Author

Level 1

14 points

Why are my M4 MacBook Pro USB-C ports not working?

Description:

On a MaBookPro 14” M4:

Thunderbolt/USB-c ports behaving oddly.

An SSD drive or any other accessory is not recognized or powered from any of the 3 ports.

A sort of docking station, a powered Hama 00200102 multiport could not be used on any of the USB-C ports.

But, a ACT USB-C 4K 60Hz Multiport Dock (not powered), works flawlessly on any USB-C port.

All drives and accessories work perfectly when connected via the Multiport dock.

MacBook is 1 month old.

Started also in Safe Mode a as advised in Apple Support community - no improvement

EtreCheck report

[Re-Titled by Moderator]

MacBook Pro 14″, macOS 15.4

Posted on May 5, 2025 5:55 AM

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Answer 1

Top-ranking reply

Grant Bennet-Alder

Level 10

139,667 points

May 5, 2025 7:05 AM in response to Paul Colin1

there have been reports of badly-behaved peripherals that are not following standards are are unable to cope with the advanced ThunderBolt and USB environment provided by this new model:

Three Thunderbolt 5 (USB-C) ports with support for:
Charging
DisplayPort
Thunderbolt 5 (up to 120Gb/s)
USB 4 (up to 120Gb/s)

in general, when devices are having difficult adapting to standards, you will need to contact the device-maker for resolution, sometimes in the form of a firmware update or new Driver for their device(s).

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Answer 2

May 5, 2025 6:59 AM in response to Paul Colin1

the item you posted is a reference to a file on your computer, and is inaccessible.

the start a reply on the forms, click the "additional text" icon and PASTE

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Why are my M4 MacBook Pro USB-C ports not working?

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