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bluetoothd high cpu usage

I am using macbook pro 2015 with Monterey version 12.1. Almost every time when I open the screen and login in the usage of cpu surges more then 200%. It's even stranger because mac isn't connected to any device! To fix it I turn off and on the bluetooth, which doesn't seem a good solution to me. Is there any better ways to fix it?

Posted on Dec 20, 2021 8:18 PM

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This appears to be fixed as of Monterey 12.3.

Posted on Mar 16, 2022 4:42 PM

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71 replies

Feb 18, 2022 5:41 AM in response to tree_frog

Excellent summary from tree_frog above


MacBook Pro mid-2015 MacOS 12.2.1 - Tried all the suggested 'fixes" indicated and the bluetoothd process using 200%+ cpu issue would randomly reoccur. I thought this could to be tied to an open lid / wake from sleep issue which is one of the functions the System Management Controller (SMC) controls. I did a SMC & NVRAM (PRAM) reset per the Apple instructions. My MacBook worked normally for 4 days then the bluetoothd issue popped up again.


Until a system update fixes this - a suggestion is to take a look at installing iStat Menus. One of the myriad of options available is to put a CPU percentage used value in the menu bar. If you see a high reading persist you can click it and see the top 5 processes currently running - and bluetoothd will probably be at the top of the list. As we know toggling bluetooth off and back temporarily stops the problem. This is way faster than going to Activity Monitor to see what's going on or waiting to hear the fans spin up. (I have no affiliation the company that does iStat Menus)

Feb 18, 2022 5:53 AM in response to DickVH

Yes, we need to wait until Apple fixes the issue in an upcoming macOS update. Until the fix arrives, I do the following as a workaround. (The workaround is preventive in nature, and it works for me.)


Since the issue occurs after a wake from a long sleep, I toggle bluetooth off just before I close the lid at night. Next day, when I open the lid in the morning, I toggle the bluetooth back on.


It looks like the wake event triggers the issue after a long sleep, when the bluetooth is enabled.

Mar 3, 2022 1:44 AM in response to miago

Macbook Pro Mid 2015, MacOS 12.2.1, SSD Samsung 970 Pro (old) --> SanDisk Extreme Pro (new)


The problem seems to have disappeared for me. At least I did not have any Bluetooth issues for more than seven days. Two things happened that could have been the "fix":


* I had troubles with my SSD for some time, all connected to wake-up just like the Bluetooth issue. The late stage included regular NVMe kernel panics during wake-up. I believe this was a result of a severe bug in the TRIM implementation of Samsung SSDs described here: https://github.com/dortania/bugtracker/issues/192 To avoid further troubles, I replaced the Samsung SSD with Sandisk (see above).


* As a result of the SSD replacement, I had to install MacOS cleanly and migrate data from backup. After this, the system started acting much better, including the side effect that the Bluetooth issue was gone.


This leads me to two questions:


(1) Did anybody experience the Bluetooth issues disappear after a complete reinstall (i.e. wipe SSD, install MacOS, migrate from backup)?


(2) Those of you that have the Bluetooth issue, did you replace your Apple NVMe SSD with an SSD that suffers the TRIM bug (link above)?


In the case of (1), there is hope to fix Bluetooth by a complete reinstall. Plus, an upcoming MacOS update, e.g. 12.3, could address the issue. In the case of (2) being the root cause, future MacOS updates will likely not be of any help.

Mar 4, 2022 11:27 PM in response to asdadafad

Disregard my earlier speculation. It was not a hardware issue and not solved by a complete reinstall. Today, no the eight day, the Bluetooth issue reappeared.


But I reappeared when I was have Bluetooth connected (AirPods) in the evening right before the system went so sleep. This was not the case in any of the seven days before. Maybe have Bluetooth active when going to sleep (and not finding the hardware when waking up? Because the AirPods were then in their case.) is a prerequisite for the Bluetooth problem to appear.


I also discovered that when Bluetooth is at 200%, just opening Bluetooth preferences crashes and restarts the Bluetooth process, also solving the high CPU issue.


Oh well... we will have to wait for MacOS 12.3 and hope it solves this MacOS bug. I hope nobody already tried to reinstall their system or ordered hardware inspired by my post.

bluetoothd high cpu usage

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