Mac Studio USB ports not working after Tahoe 26.5.2 update

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Level 1

4 points

Mac Studio USB ports not working after Tahoe 26.5.2 update

Mac Studio 2025 (M4 Max): Rear USB-A and front USB-C ports stopped working after macOS Tahoe 26.5.2 update

My Mac Studio (2025, M4 Max) was delivered just last Monday. Everything worked perfectly for the first several days.

However, this morning I found that both rear USB-A ports and the front USB-C ports no longer recognize any connected devices. It doesn't matter what I plug in—they simply aren't detected.

The only thing that comes to mind is that the Mac installed the macOS Tahoe 26.5.2 update overnight.

***

I'd like to know whether this is a software/firmware problem related to the update or if my Mac Studio has developed a hardware fault.

Any information or similar experiences would be greatly appreciated.

Ahoahoman

[Edited by Moderator]

Mac Studio, macOS 26.5

Posted on Jul 14, 2026 12:41 AM

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Answer 1

Jul 14, 2026 12:50 AM in response to 亮113

USB port failure can occur after a macOS update.

If a simple Restart doesn't cure it, shut down the Mac, remove the power plug from the wall outlet and wait at least 2 minutes before reconnecting.

Then restart your computer and check the USB functionality.

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Answer 2

Owl-53

Level 10

112,175 points

Jul 14, 2026 2:35 AM in response to 亮113

Apple's Standard Returns Policy

If you are dissatisfied with an item, you can request a return through Order Status.

For eligible iPhone, Mac, iPad, Apple Watch and third-party products, you have up to 15 calendar days from the time you receive your item(s) to initiate a return

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