Logitech MX Master 2S (and MX Master) now unable to connect via Bluetooth

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Logitech MX Master 2S (and MX Master) now unable to connect via Bluetooth

I am on a non-touchbar MacBook Pro with OS 10.13.6. I had both and MX Master and MX Master 2S connected and working via Bluetooth. All of the sudden they both stopped working and would no longer connect (I don't think I had done any software update at that exact point in time?). They both still connect fine via the Unifying USB dongle, and I can successfully connect other Bluetooth devices to my laptop.

Below is the screengrab of what happens when I try to connect. The mouse shows up in the Bluetooth device list (regardless of whether I have the mouse in pairing mode or not; in fact, if I put it into pairing mode then a second duplicate device shows up in the device list), and when I click connect it hangs on this screengrab saying it's trying to connect, but eventually fails and then just says the device is "not connected".

I've gone through all the existing posts I could google about this issue and none of those solutions helped, and none of those posts explicitly mention this exact issue.

This laptop only has two USB ports so I only consider the Unifying dongle a temporary and unsatisfying fix. Thanks.

MacBook Pro 13", macOS 10.13

Posted on Jul 14, 2019 8:44 AM

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Answer 1

gbernstein Author

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Aug 7, 2019 10:23 AM in response to Grant Bennet-Alder

Another poster on the Logitech forum said they fixed it by upgrading to OS 10.14.6, so the newest High Sierra update to OS 10.13.6 must introduce the issue.

https://support.logi.com/hc/en-us/community/posts/360033306694/comments/360008404094

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Answer 2

gbernstein Author

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Jul 14, 2019 9:20 AM in response to Grant Bennet-Alder

I have a usb-dongle keyboard and an external monitor, but I had read those might affect the bluetooth connection so I've tried it with those disconnected as well. I've also tried restarting the bluetooth module and deleting the .plist, updating Logitech Options, and making sure iCloud handoff was disabled (it already was).

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Answer 3

gbernstein Author

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Jul 19, 2019 5:02 AM in response to gbernstein

Looks like this has happened to more people so it's definitely not a device failure

https://support.logi.com/hc/en-us/community/posts/360033306694-MX-Master-2S-and-MX-Master-now-unable-to-connect-via-Bluetooth

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Answer 4

Jul 14, 2019 9:07 AM in response to gbernstein

Are you using any other peripherals? which ones?

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Answer 5

gbernstein Author

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Jul 14, 2019 9:46 AM in response to Grant Bennet-Alder

I’ve tried the Bluetooth connection with all other peripherals disconnected to no avail, so that doesn’t seem to be the issue.

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Answer 6

Jul 14, 2019 9:56 AM in response to gbernstein

Then perhaps you have a 'sample defect' -- a failure in your device alone, and not a design problem or software conflict..

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Answer 7

gbernstein Author

Level 1

9 points

Jul 14, 2019 10:04 AM in response to Grant Bennet-Alder

That's possible but unlikely given that it happened with two different models of Logitech mice at the same time, and that my laptop can connect to other bluetooth devices.

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Answer 8

Jul 14, 2019 9:26 AM in response to gbernstein

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:

Using USB devices with your Mac - Apple Support

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Logitech MX Master 2S (and MX Master) now unable to connect via Bluetooth

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