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kentzh

macrumors member
Original poster
Dec 16, 2021
80
37
The system version is 12.2.1. Yesterday, I accidentally discovered that the system program launchd writes 79.41GB, and kernel_task writes 4.22GB. They are only system applications. Why do they have such large read and write operations? Is this normal behavior? Have you encountered the same situation?
WeChat4697fd5f9c3e2d75b8ed2b1a24f08324.png


About half an hour after turning on the computer, another 1.07G has been written, and other system applications are also continuing to write.

WeChat451255858ce6c1357e44674d2697abda.png
 

chabig

macrumors G4
Sep 6, 2002
11,318
9,010
They are only system applications.
They aren't just system applications. They are low level operating system tasks that touch everything that happens on your machine. That's normal. My kernel task report 1.1TB written and everything is fine.
 
Last edited:

TiggrToo

macrumors 601
Aug 24, 2017
4,205
8,838
The system version is 12.2.1. Yesterday, I accidentally discovered that the system program launchd writes 79.41GB, and kernel_task writes 4.22GB. They are only system applications. Why do they have such large read and write operations? Is this normal behavior? Have you encountered the same situation?
View attachment 1962242

About half an hour after turning on the computer, another 1.07G has been written, and other system applications are also continuing to write.

View attachment 1962243
This is from 7 years ago, but might still be of use:

 

yitwail

macrumors 6502
Sep 4, 2011
427
479
They aren't just system applications. They are low level operating system tasks that touch everything that happens on your machine. That's normal. My kernel task report 1.1TB written and everything is fine.
Glad to hear that because I have kernel task 202GB written
 

SirKeldon

macrumors 6502
Nov 22, 2021
262
201
Barcelona, Spain
I'm experiencing same issues with high numbers in disk write caused by launchd and kernel_task in my 14" M1 Max. I was in 12.2.1 and tried a couple times "Erase all content and settings" with same similar results. In 4 days, kernel_task wrote 8GB and launchd more than 5GB into disk.

Digging around with the post mentioned by @TiggrToo I reached to find that it was launchd.log it was writing the most.

Yesterday night I updated to 12.3.1 and still didn't reboot from the initial install and launchd has writen 900 Mb so far in 14h, despite being real used just 2-3h. Right now I'm experiencing same issues as here

My launchd.log looks like this constantly and I think it's one of the causes that it's writing to disk that often:

Code:
2022-04-09 13:44:33.044430 (gui/501/com.apple.MRTa) <Notice>: service state: spawning
2022-04-09 13:44:33.044520 (gui/501/com.apple.MRTa) <Notice>: launching: xpc event
2022-04-09 13:44:33.046663 (gui/501/com.apple.MRTa [3663]) <Notice>: xpcproxy spawned with pid 3663
2022-04-09 13:44:33.046706 (gui/501/com.apple.MRTa [3663]) <Notice>: internal event: SPAWNED, code = 0
2022-04-09 13:44:33.046719 (gui/501/com.apple.MRTa [3663]) <Notice>: service state: xpcproxy
2022-04-09 13:44:33.046728 (gui/501/com.apple.MRTa [3663]) <Notice>: deferred event: domain spawn response: 0
2022-04-09 13:44:33.046739 (gui/501/com.apple.MRTa [3663]) <Notice>: internal event: SOURCE_ATTACH, code = 0
2022-04-09 13:44:33.058569 (gui/501/com.apple.MRTa [3663]) <Notice>: service state: running
2022-04-09 13:44:33.058592 (gui/501/com.apple.MRTa [3663]) <Notice>: internal event: INIT, code = 0
2022-04-09 13:44:33.058618 (gui/501/com.apple.MRTa [3663]) <Notice>: Successfully spawned MRT[3663] because xpc event
2022-04-09 13:44:33.114906 (gui/501/com.apple.MRTa [3663]) <Notice>: exited due to exit(0)
2022-04-09 13:44:33.114923 (gui/501/com.apple.MRTa [3663]) <Notice>: service state: exited
2022-04-09 13:44:33.114929 (gui/501/com.apple.MRTa [3663]) <Notice>: internal event: EXITED, code = 0
2022-04-09 13:44:33.114938 (gui/501 [100012]) <Notice>: service inactive: com.apple.MRTa
2022-04-09 13:44:33.114970 (gui/501/com.apple.MRTa [3663]) <Notice>: service state: not running
2022-04-09 13:44:33.114993 (gui/501/com.apple.MRTa) <Notice>: Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
2022-04-09 13:44:33.115013 (gui/501/com.apple.MRTa) <Notice>: internal event: WILL_SPAWN, code = 0
2022-04-09 13:44:33.115020 (gui/501/com.apple.MRTa) <Notice>: service state: spawn scheduled
2022-04-09 13:44:33.115024 (gui/501/com.apple.MRTa) <Notice>: service throttled by 10 seconds
2022-04-09 13:44:43.118315 (gui/501/com.apple.MRTa) <Notice>: service state: spawning
2022-04-09 13:44:43.118392 (gui/501/com.apple.MRTa) <Notice>: launching: xpc event
2022-04-09 13:44:43.120820 (gui/501/com.apple.MRTa [3664]) <Notice>: xpcproxy spawned with pid 3664
2022-04-09 13:44:43.120864 (gui/501/com.apple.MRTa [3664]) <Notice>: internal event: SPAWNED, code = 0
2022-04-09 13:44:43.120878 (gui/501/com.apple.MRTa [3664]) <Notice>: service state: xpcproxy
2022-04-09 13:44:43.120887 (gui/501/com.apple.MRTa [3664]) <Notice>: deferred event: domain spawn response: 0
2022-04-09 13:44:43.120899 (gui/501/com.apple.MRTa [3664]) <Notice>: internal event: SOURCE_ATTACH, code = 0
2022-04-09 13:44:43.130639 (gui/501/com.apple.MRTa [3664]) <Notice>: service state: running
2022-04-09 13:44:43.130654 (gui/501/com.apple.MRTa [3664]) <Notice>: internal event: INIT, code = 0
2022-04-09 13:44:43.130672 (gui/501/com.apple.MRTa [3664]) <Notice>: Successfully spawned MRT[3664] because xpc event
2022-04-09 13:44:43.140510 (pid/3662 [Console]) <Notice>: Service stub created for com.apple.extensionkitservice
2022-04-09 13:44:43.157366 (pid/3662 [Console]) <Notice>: Service stub created for com.apple.ctcategories.service
2022-04-09 13:44:43.182523 (gui/501/com.apple.MRTa [3664]) <Notice>: exited due to exit(0)
2022-04-09 13:44:43.182551 (gui/501/com.apple.MRTa [3664]) <Notice>: service state: exited
2022-04-09 13:44:43.182560 (gui/501/com.apple.MRTa [3664]) <Notice>: internal event: EXITED, code = 0
2022-04-09 13:44:43.182567 (gui/501 [100012]) <Notice>: service inactive: com.apple.MRTa
2022-04-09 13:44:43.182593 (gui/501/com.apple.MRTa [3664]) <Notice>: service state: not running
2022-04-09 13:44:43.182614 (gui/501/com.apple.MRTa) <Notice>: Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
2022-04-09 13:44:43.182636 (gui/501/com.apple.MRTa) <Notice>: internal event: WILL_SPAWN, code = 0
2022-04-09 13:44:43.182642 (gui/501/com.apple.MRTa) <Notice>: service state: spawn scheduled
2022-04-09 13:44:43.182648 (gui/501/com.apple.MRTa) <Notice>: service throttled by 10 seconds


Any solution? Any workaround? Cause the ones explained in the thread I linked they're not working for me, I can't see a list of temporary files I could delete :(
 
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