weird files macos download folder

Copper Contributor

Microsoft teams on macos is downloading/creating weird files in the download folder. The folder Teams writes to is called MSTeams. The files are named something like CompositorOutput_0x120289da698_256x134_NV12.yuv and all of them always end with .yuv. What is this and how do I turn it off again? Teams does not even have any write permissions in the system settings. 

6 Replies

Hi @berrynotec,

the files you're encountering are high-likely temporary files generated by Microsoft Teams during its operation, with the .yuv extension indicating their association with video data, possibly from video calls or meetings.

It is unusual that these files are not automatically cleaned up by Microsoft Teams.

1) Ensure your Microsoft Teams application is up-to-date, as newer versions may resolve such issues.

2) Clear Microsoft Teams cache:

Classic Teams

  1. If Teams is still running, right-click the Teams icon in the dock, and then select Quit or press Command (⌘)-Q.

  2. In the Finder, open the /Applications/Utilities folder, and then double-click Terminal.

  3. Enter the following command, and then press Return:

 

rm -r ~/Library/Application\ Support/Microsoft/Teams

 

  • Restart Teams.

New Teams

  1. If Teams is still running, right-click the Teams icon in the dock, and then select Quit or press Command (⌘)-Q.

  2. In the Finder, open the /Applications/Utilities folder, and then double-click Terminal.

  3. Enter the following commands, and press Return after each command:

 

rm -rf ~/Library/Group Containers/UBF8T346G9.com.microsoft.teams
rm -rf ~/Library/Containers/com.microsoft.teams2

5. Restart Teams.

 



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Kindest regards,


Leon Pavesic
(LinkedIn)
(Twitter)

Have same issue. MS teams keeps writing to Downloads/MSTeams on each call leaving bunch of CompositorOutput_***.yuv files that have to be cleaned up manually

 


@LeonPavesic wrote:

New Teams

  1. If Teams is still running, right-click the Teams icon in the dock, and then select Quit or press Command (⌘)-Q.

  2. In the Finder, open the /Applications/Utilities folder, and then double-click Terminal.

  3. Enter the following commands, and press Return after each command:

 

 

rm -rf ~/Library/Group Containers/UBF8T346G9.com.microsoft.teams
rm -rf ~/Library/Containers/com.microsoft.teams2

 

5. Restart Teams.


 

tried this - did not help.

did not help. still happening. also legacy version keeps reappearing in applications although I deleted it several times. would be great if microsoft could fix this and not pollute my download folder with theses unwanted files
I have the same issue. Have you been able to solve it somehow?

@adamlenger 

no still the same issue. 

I have this same problem now, did anyone ever find a solution? Seems to only build up these file when I am in a teams call. I have to keep deleting them throughout the call to prevent my system from running out of storage. Within 30 minutes the folder could have 90+ gb