How do I fix intermittent Bluetooth connectivity issues with MacBook Pro M1 and Caldigit TS4?

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How do I fix intermittent Bluetooth connectivity issues with MacBook Pro M1 and Caldigit TS4?

I have 2 MBP M1Pros and a Caldigit TS4. I plug the TS4 into the MBP I need to use (a swap). Great setup. I use a wired BT Magic KB on the TS4. Recently, my Bluetooth (BT) devices occasionally stop working and won't connect (even the wired connected BT KB). I end up forgetting them, futzing around, and, with luck they connect again. Sometimes they start working magically, like after I give up for a while. Anyone have this issue with BT devices, and, more importantly, the fix? BTW I'm not sure if the TS4 has anything to do with it. My BT mouse with its transceiver plugged into the TS4 always works.

[Re-Titled by Moderator]

Original Title: MBP M1Pro Bluetooth Issues

MacBook Pro 16″, macOS 15.7

Posted on Jan 2, 2026 9:20 AM

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Grant Bennet-Alder

Level 10

140,771 points

Jan 2, 2026 10:09 AM in response to A.Richard

Why do I have difficulty with Wi-Fi or Bluetooth devices when USB 3 devices are attached to my computer?

Some USB 3 devices can generate radio frequency interference that can cause Wi-Fi and Bluetooth devices operating in the 2.4GHz band to have issues communicating with your computer. Here are some tips to avoid this issue:

• If your USB device has a cable long enough that you can move the device, place it away from your Mac—and make sure not to place it behind your Mac, or near the hinge of its display. The antennas for Wi-Fi and Bluetooth are located there, and USB 3 devices placed there might interfere with your wireless connections.

• If you're using adapters or dongles on a Mac computer with Thunderbolt 3 (USB-C) ports, plug them into the front port on the left side of your Mac, or into the ports on the right side (if your computer has them). These ports are the farthest away from the antennas, making interference less likely.

• To avoid interference on the 2.4GHz band using Wi-Fi, try using the 5GHz band instead. You can change this on your wireless base station. Bluetooth always uses 2.4GHz, so this alternative isn't available for Bluetooth.

from:

About USB on Mac computers - Apple Support

Resolve Wi-Fi and Bluetooth issues caused by wireless interference

Resolve Wi-Fi and Bluetooth issues caused by wireless interference - Apple Support

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