Connecting and using a bluetooth mouse (MS Sculpt Comfort Mouse) causes high cpu usage of the process bluetoothd. After a little time surfing some websites this process has the highest amount on cpu time. Can be verified on two different products, Mac Mini 2012 and Macbook Pro Late 2013.
Apple please fix this finally!
There is already another thread (https://discussions.apple.com/thread/250871783) but it seems that nothing is happening...
Mac mini, macOS 10.15
I started another thread on this topic in the MacBook forum before I found this one (https://discussions.apple.com/thread/251593785). I am having the same problem with bluetoothd using crazy amounts of CPU% and causing my Magic Trackpad to behave poorly (not responding to clicks, randomly double clicking, etc.)
I am not using any third party Bluetooth devices. Just a Magic Keyboard and Magic Trackpad.
I was able to reach Apple Support and they suggested that because the bluetoothd process was initiated by the root user, my best course of action was to reinstall macOS. That turned out to be not as big a deal as it might seem, because macOS Recovery allowed me to reinstall the OS without wiping my drive.
I followed the instructions in this article: https://support.apple.com/en-us/HT204904
Since I reinstalled the OS, bluetoothd seems to be behaving much more normally and I have not experienced the bad behavior from my Magic Trackpad.
Fingers crossed that solves it for good.
You may be right, Chris. but so far, the bluetoothd process on my machine has not spiked since I did the macOS reinstall. Time will tell. I'll post here if and when I have any new information to share.
I first started seeing this problem on my new MacBook Pro 16 with a logitech mouse and it is totally unusable.
Now since I installed Catalina it's happening on my iMac 27" Late 2015 with Apple Magic Mouse - its usable but barely.
Restart fixes it for a short time.
bluetoothd runs over 80% CPU constantly!
Help!
I don't think this will solve the problem. I'm running a Mac Mini 2012 and a MacBook Pro 15 Late 2013 and both show the same problem. A few weeks ago I tested a new MacBook Pro 16 (which I later sent back because of the fan noise when connecting an external monitor) and this also had this weird issue although no additional software was installed.
Thanks for your suggestion. Sadly, I just did it and it didn't work. By the way I am using a Microsoft Sculpt Comfort Mouse.
However I realised that the "recovery time" if I can call that way the amount of time the CPU goes to 100% and then drops to 0 - 1% has improved. The CPU is no longer stressed in a non-stop basis when I am not using the mouse.
Having said that, 100% CPU usage for moving the pointer or the wheel is quite frustrating.
Best.
liturra, give this a try, it worked for me: https://support.apple.com/en-us/HT204904
Unfortunately MacOS 10.15.5 changes nothing regarding this weird behaviour. Apple, please check the cpu-load when using third-party bluetooth peripherals!
Same issue here. Best
bluetoothd high cpu usage
