MS Teams Helper using up >100% of CPU MacBook

You made my day. I can report, my Gaming Mouse (Rockt Nyth) was causing this error.

Root cause of mine turned out to be a gaming mouse I was using. Hard to diagnose, though, because the problem didn't always manifest immediately and it seemed to be dependent on my resetting teams.

Here's how I got to the bottom of it:

1. Unplug everything but power - monitor, USB accessories, etc. Open Activity Monitor so you can check Teams' CPU usage.
2. Start up teams. Does it still eat your CPU? If not, then this is not going to help and you've got some other problem.
3. Stop Teams.
4. Plug in one peripheral and start Teams again. Use it for 10 minutes.
5. Does it still eat your CPU? If yes - you've found your problem.
6. If not, stop teams again and repeat for every peripheral you use.

Hopefully this helps someone.

This post is from 2020... And still an issue today.

Why isn't this solved yet. My CPU is 87% on a teams call.

Please fix this.

What "fixed" it for me was going into Preferences, then Files, and choosing for Teams to open files in the teams app. I had changed it to Desktop App before since I like that better but noticed the spiking in Microsoft Teams Helper (Renderer). Had been like this for about 2 weeks then it struck a lightbulb that this started when I made the change initially. As soon as I reverted back to Teams in that setting the problem went away almost instantly.

I wrote a bash script along with 'cpulimit' via Homebrew to stop it from overusing CPUs. Had to do the same for OneDrive. while it does slow MS teams down a bit, my mac remains usable. YMMV

#!/bin/bash
while [[ 1 ]]; do
clear
date
cpulimitpids=ps auxm | egrep -v "grep" | egrep cpulimit | egrep "pid=" | tr -s " \t" "\t" | cut -f 15 | tr -s "=" "\t" | cut -f2

echo OneDrive:  
uppercasename=ONEDRIVE  
apppids=`ps auxm | egrep OneDrive | egrep -v grep | egrep -v "File Provider|FinderSync" | tr -s " \t" "\t" | cut -f2 | sort -n`  
for apppid in ${apppids[@]}; do  
     FOUND=`echo $cpulimitpids | tr " " "\n" | egrep "^$apppid\$" | wc -l`  
    if [[ "$FOUND" -eq "0" ]]; then  
        cpulimit --limit=100 --lazy --include-children --pid=$apppid &  
    fi  
    echo ${uppercasename}:  $apppid  Found:  $FOUND  
done  

echo Teams:  
uppercasename=TEAMS  
apppids=`ps auxm | egrep 'Microsoft Teams Helper' | egrep -v GPU | tr -s " \t" "\t" | cut -f2 | sort -n`  
for apppid in ${apppids[@]}; do  
    FOUND=`echo $cpulimitpids | tr " " "\n" | egrep "^$apppid\$" | wc -l`  
    if [[ "$FOUND" -eq "0" ]]; then  
       cpulimit --limit=100 --lazy --include-children --pid=$apppid &  
    fi  
    echo ${uppercasename}:  $apppid  Found:  $FOUND  
done  
sleep 60  

done