bluetooth connection lost

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Level 1

22 points

bluetooth connection lost

After operating flawlessly for years, recently my 2017 21.5 in iMac has been unable to maintain its connection to my mouse and keyboard. It started after I updated to OS Catalina. I have tried restarting the computer, resetting the Bluetooth module, reinstalling the system software, deleting the bluetooth preferences file and nothing has helped. The mouse and keyboard connect and seem to be operating properly, then stall. an alert reading connection lost appears on the screen. this is extremely frustrating and I have been forced to use a clunky wired keyboard and mouse. has anyone else had this problem and found a solution?

iMac 21.5″ 4K, macOS 10.15

Posted on Oct 20, 2020 6:01 AM

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Answer 1

Top-ranking reply

den.thed

Level 10

82,432 points

Oct 20, 2020 7:00 PM in response to Blackdawgrva

Do you have any TB 3 or USB 3.0 external drives, other devices and/or their cables anywhere around your wireless keyboard and mouse? If so, try move those devices from in between and away from your iMac and Wireless devices.

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

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Answer 2

Blackdawgrva Author

Level 1

22 points

Oct 21, 2020 1:50 PM in response to den.thed

Opps. Spoke too. soon. After several hours of functioning normally, the iMac lost Bluetooth connection to both devices. I've reported the problem to Apple because I think it must be a software problem. I'm stuck with the wired devices until they come up with a. fix.

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Answer 3

Ronasara

Level 6

15,043 points

Oct 20, 2020 10:07 AM in response to Blackdawgrva

Have you tried running Disk Utility to see if anything needs to be fixed? Sometimes we have to rerun it multiple times to get a solid fix.

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Answer 4

Blackdawgrva Author

Level 1

22 points

Oct 20, 2020 6:08 PM in response to Ronasara

Thanks. Did that. No effect. The bluetooth mouse and keyboard connect and appear to be operating normally then stall with no warning and lose connection. I’m stuck with a wired keyboard.

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Answer 5

Blackdawgrva Author

Level 1

22 points

Oct 21, 2020 6:42 AM in response to den.thed

Thanks. Will try that.

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Answer 6

Blackdawgrva Author

Level 1

22 points

Oct 21, 2020 11:26 AM in response to den.thed

I think you've got it! Moved my external hard drive as far away from the iMac as the cord will allow and so far the mouse and keyboard are behaving as expected. Thanks!

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Answer 7

den.thed

Level 10

82,432 points

Oct 21, 2020 3:17 PM in response to Blackdawgrva

Sorry to hear that. I would also look around to see if you have any other electrical devices like a wireless phone base, a fan, a TV or something like that in the area.

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Answer 8

Blackdawgrva Author

Level 1

22 points

Nov 2, 2020 4:19 PM in response to den.thed

Thanks for all the suggestions, which I followed. Turned out I have a failing logic board, so it was a hardware issue. I appreciate everybody’s attempts to solve the problem.

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Answer 9

den.thed

Level 10

82,432 points

Nov 2, 2020 4:22 PM in response to Blackdawgrva

Your welcome. Sorry to hear, that you had a more serious issue.

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bluetooth connection lost

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