Mrt mac os грузит процессор
After the MRT update v. 1.68 my mid 2011 iMac is going insane with CPU percentages hitting %180s with MRT on Activity Monitor. Running El Capitan and tried resetting NVRAM and PRAM. Nothing worked besides formatting the hard disc and restoring from a previous back up that was done 2 weeks ago. However, MRT got updated a few hours later and I am back where I started. I also ran a few malware scans but those did not find anything suspicious. Would greatly appreciate any help, thanks!
Posted on Oct 21, 2020 3:59 AM
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Apple posted an update to MRT v1.21 yesterday which caused this issue for a few users. Apple is aware of the problem, has pulled this update and substituted MRT v1.20, but I don't believe it will automatically replace the one you have because yours is newer. I'm confident that Apple will fix the problem when they return to work on it, but it's anybody's guess when that might be.
Some users have run Malwarebytes for Mac to remove the adware/malware that MRT seems to be struggling with, so I recommend you give that a try first.
Any other solution will be complicated and time consuming.
Aug 26, 2017 4:43 AM
Thank you kindly for the response! Will try this!
Aug 26, 2017 4:59 AM
Hmmm. It seems this Malware thing is a scam. You should not recommend that to people!
Aug 26, 2017 5:03 AM
Are you referring to Malwarebytes for Mac? It's definitely not a scam. It was developed by one of the foremost security contributors here in the Forum and a colleague of mine, Mr. Thomas Reed. What gives you the impression it's a scam?
Aug 26, 2017 5:07 AM
because everywhere I look on this forum it says DO NOT install any 3rd party anti malware or anti virus. It will ruin your computer and is a malware itself that will ask for money constantly
Aug 26, 2017 5:09 AM
Not everywhere. Search for "Malwarebytes" and you will find hundreds of recommendations from dozens of us. You will find only two anti-malware brands recommended here, ClamXAV and Malwarebytes.
The newest version of Malwarebytes includes a new optional premium feature (RealTime scanning) that will cost after the 30 day trial, but it's scanning function remains free forever and is fully functional as a manual scan with frequent updates.
Aug 26, 2017 5:30 AM
So it seems MRT had nothing to do with this. Eventually it quit on its own after doing whatever it was doing. The fans went quiet and then for no apparent reason the next day. they started up again like a freakin jet airplane. Seriously disturbing. I looked at the activity monitor and MRT was no where to be found. Neither was the cupsd. I am truly baffled. Ideas anyone?
Aug 28, 2017 7:29 AM
No, I'm confident that this was an MRT problem caused by some adware/malware on you computer that MRT was unable to properly deal with. At least a dozen others were reporting the same situation here in the Forum since Friday.
Apple updated MRT automatically for you in the background over the weekend, which fixed their problem and hopefully allowed it to remove that adware/malware for you. Rest assured that this specific issue is gone.
Aug 28, 2017 4:31 PM
How can you download the fix for the MRT CPU consuming problem?
Aug 30, 2017 9:08 AM
It downloads in the background automatically within 24 hours, as long as your computer is awake at the random time it uses to install such things.
If you can't wait that long, you can speed things up by copying and pasting the following command into a Terminal window. The Terminal app is in /Applications/Utilities/
sudo softwareupdate --background
You will be asked for your admin password. When you enter it nothing will be seen. Just hit enter after typing it.
The only feedback you get will be "Triggering background check with normal scan . " and it may take up to five minutes before the background process completes. You can follow it's progress, if you want, by viewing your install.log in the Console application.
Aug 30, 2017 12:50 PM
Hi Mad Macs! I really appreciate all your efforts in helping us solve this. Although my problem is not completely solved it has gotten much better. I think its time to research more into what is happening and see if there is a solution on my end. Thank you again. You were the only one here trying to help.
Aug 31, 2017 5:58 AM
Glad that took care of that issue.
Both EtreCheck and Malwarebytes might give you some insight into your remaining problems. I'll add one more recommendation for DetectX. All three of these were developed by fellow troubleshooters here in the Forum that I converse with on a daily basis and know to be focused on helping users without contributing to their problems. All are fully functional in trial mode and easily removed if you no longer have need for them. If they are useful, then I would encourage you to support their efforts and in some cases, their livelihood.
If you have additional questions, be sure and start a new discussion in order to draw maximum interest. Only a couple of us are likely to spot any additional you post here.
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For the most part MalwareBytes is not really needed. MRT or Malware Removal Tool is part of the built-in anti-malware software of macOS. That said, there should be a reason why MRT is spiking CPU usage given that it is a background process. You might consider removing MalwareBytes temporarily to see if that has any effect on MRT. You can also try running the computer in Safe Mode to see if that affects MRT's spiking usage.
About Using Safe Mode
Boot Into Safe Mode
- If your Mac isn’t already shut down, then shut it down and wait at least 30 seconds before rebooting.
- Immediately, at or before the chime, press and hold down the SHIFT key.
- Release the key after the Apple logo and progress bar appear.
- Safe mode startup is much slower than normal startup, so be patient.
- When the Login Screen appears enter your admin password. If you use automatic login, then this means you are in safe mode.
Mar 6, 2020 10:08 AM
Thank you for your response. I ran in Safe Mode for a couple of days - MRT did not go haywire in that time. But the 100% CPU looping did recur 15 days later.
Does anyone know if these files created by MRT are important? They are paired, and created once or twice a month. Some months are skipped. I can't imagine three-year old files are useful.
In any event you can't send them to Trash.
Maybe the question is can I be rid of MRT altogether?? It lives in /Library/CoreServices which seems "important". I certainly don't want to break my dear iMac.
Mar 22, 2020 10:03 AM
MRT is the built-in Malware Removal Tool. You don't want to remove it nor any of the files it creates. The ones you listed are needed parts of the MRT package. They are kept in Receipts because they used to keep track of upgrades to MRT.
Please do not remove any of these files or your computer will become completely open to security risks from malicious malware. I realize it appears that the tool sometimes uses a lot of CPU time but sometimes this may be normal (I don't have any idea about what normal is for the MRT.) I sometimes see all the cores on my iMac using a lot of processing time when Spotlight is indexing.
Now, that said it's possible for some files to become corrupted, thus, causing serious problems for the CPU. The most frequent culprit is caches that become corrupted. There are Caches folders in all the Library folders use by macOS. Most can be removed (but not all) because they will rebuild automatically when called for. One way to get some essential caches remove and rebuilt is to boot the computer into Safe Mode, then reboot normally. This clears some caches.
Another group of files that get corrupted is preference (usually, .plist files) files.
If you do a Google search using "what is mrt in macOS" for the search term, then you will find lots of informative material about MRT.
HI folks! I really hope someone can help. I am in Italy on a big project and on my MBP late 2011 something called MRT is peaking my cpu and causing the computer fans to go insane, raving super fast and LOUD! I first dealt with the CUP situation and it seems to be gone from the activity monitor. Now the problem is back with something called MRT in the activity monitor causing this problem. CPU is always a 90 - 95 usage with this thing.
Also I have noticed the printer preferences pane locks up the systems preferences then crashed it. No idea why.
I am at my wits end and I can't work! Please help. Thanks in advanced. P
MacBook Pro (17-inch Late 2011), Mac OS X (10.7.5), SSD drive maxed RAM ;-)
Posted on Aug 26, 2017 3:44 AM
It downloads in the background automatically within 24 hours, as long as your computer is awake at the random time it uses to install such things.
If you can't wait that long, you can speed things up by copying and pasting the following command into a Terminal window. The Terminal app is in /Applications/Utilities/
sudo softwareupdate --background
You will be asked for your admin password. When you enter it nothing will be seen. Just hit enter after typing it.
The only feedback you get will be "Triggering background check with normal scan . " and it may take up to five minutes before the background process completes. You can follow it's progress, if you want, by viewing your install.log in the Console application.
Posted on Aug 30, 2017 12:50 PM
Helpful answers
I got same issue. MRT just keep up and down and my CPU like crazy.
Since I got no Time Machine backup to downgrade MRT 1.68 to 1.67, I tried rename MRT.app to MRT.app.bak
And it works! My CPU now is calm.
You may need to disable SIP so you can rename MRT.app.
This is not a final solution. Hope Apple could fix it ASAP.
Oct 21, 2020 9:13 AM
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The same with Catalina 10.15.7 and MRT 1.68. CPU hitting 100% and CrashReport appears frequently in top.
Also. lots of console errors:
ошибка 15:48:21.661355+0300 kernel Sandbox: MRT(5909) System Policy: deny(1) file-read-metadata /private/var/folders/_6/r5pq_2vj393dl69grtddknb00000gn/0/dmd/ConfigurationEngine/Database-shm
ошибка 15:48:21.661397+0300 kernel Sandbox: MRT(5909) System Policy: deny(1) file-read-metadata /private/var/folders/_6/r5pq_2vj393dl69grtddknb00000gn/0/dmd/Policies/Database
ошибка 15:48:21.661427+0300 kernel Sandbox: MRT(5909) System Policy: deny(1) file-read-metadata /private/var/folders/_6/r5pq_2vj393dl69grtddknb00000gn/0/dmd/Policies/Database-wal
ошибка 15:48:21.661508+0300 kernel Sandbox: MRT(5909) System Policy: deny(1) file-read-metadata /private/var/folders/_6/r5pq_2vj393dl69grtddknb00000gn/0/dmd/Policies/Database
ошибка 15:48:21.661602+0300 kernel Sandbox: MRT(5909) System Policy: deny(1) file-read-metadata /private/var/folders/_6/r5pq_2vj393dl69grtddknb00000gn/0/dmd/Policies/Database-wal
ошибка 15:48:21.665994+0300 kernel Sandbox: MRT(5909) System Policy: deny(1) file-read-metadata /private/var/folders/_6/r5pq_2vj393dl69grtddknb00000gn/0/com.apple.LaunchServices.dv/com.apple.LaunchServices.trustedsignatures-501.db
ошибка 15:48:21.667130+0300 kernel Sandbox: MRT(5909) System Policy: deny(1) file-read-metadata /private/var/folders/_6/r5pq_2vj393dl69grtddknb00000gn/0/com.apple.lockoutagent
ошибка 15:48:21.684313+0300 kernel Sandbox: MRT(5909) System Policy: deny(1) file-read-metadata /private/var/db/CoreDuet/Knowledge/knowledgeC.db
ошибка 15:48:21.684360+0300 kernel Sandbox: MRT(5909) System Policy: deny(1) file-read-metadata /private/var/db/CoreDuet/Knowledge/knowledgeC.db-wal
ошибка 15:48:37.891865+0300 MRT os_unix.c:43353: (2) open(/var/db/DetachedSignatures) - No such file or directory
ошибка 15:48:37.918745+0300 MRT cannot open file at line 43353 of [378230ae7f]
ошибка 15:48:37.919441+0300 MRT os_unix.c:43353: (2) open(/var/db/DetachedSignatures) - No such file or directory
ошибка 15:48:37.919265+0300 MRT cannot open file at line 43353 of [378230ae7f]
ошибка 15:48:37.921833+0300 MRT os_unix.c:43353: (2) open(/var/db/DetachedSignatures) - No such file or directory
ошибка 15:48:37.932357+0300 MRT cannot open file at line 43353 of [378230ae7f]
Начал жутко тупить ноут. Глянул в мониторинге системы там процесс MRT сожрал 21гб памяти (переместил многое в своп). Когда его завершаешь начинает все по-новой.
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Спасибо Hercules Leopardovich за ссылку, дал мне точку отсчёта, так сказать.
На сайте: https://apple.stackexchange.com/questions/296339/m.
нашел таки решение.
Всё относительно просто. (инструкцию лучше распечатать)
1. Перезагружаемся зажав клавиши Command и R
2. В верхнем меню в "Утилиты" запускаем терминал.
3. Открывается терминал в котором вводим: $ csrutil disable (отключаем контроль целостности системы, без этого система не даст удалить файлы)
4. Перезагружаемся или выбрав в меню "Перезагрузка" или в том же терминале пишем $ reboot
5. Кому как удобно, или в Finder бегаем по папкам и удаляем:
или в Терминале вводим команды:
Не забываем проверить не остались ли файлы в Корзине.
6. Опять перезагружаемся зажав Command и R
7. Опять запускаем Терминал и вводим на сей раз команду: $ csrutil enable (включаем контроль целостности системы)
8. И вновь перезагружаемся.
Всё. Больше съедать память не будет.
Если что у меня macOS Sierra 10.12.6
В других системах список удаляемых файлов может слегка отличаться:
Ну и естественно, вы всё делаете на свой страх и риск, поскольку во-первых командой $ csrutil disable вы отключаете контроль целостности системы и если его не включить командой $ csrutil enable возможны проблемы. К тому же удаляя системные файлы вы рискуете лишиться системы. Во всяком случае я у себя сделал, всё работает. Но как знать, потому и предупреждаю, дабы потом не было претензий.
что то подобное видел, но как на счет прав, конкретно к файлам, которые можно через библиотеку удалить, но нужных прав, либо возможности их установить нет@phtimofeeff:
После обновления с Mountain Lion, kernel_task начал потреблять много ОЗУ, это нормально?
Macbook Air mid 2012
У меня такая же проблема - кернел таск жрёт все ресурсы, за ноутом становится невозможно работать. При этом сам ноут горячий. Вот что нашёл на одном из форумов:
Ох ребятушки, расскажу я Вам сказочку про кернел_таск! Когда процессор нашего многоувашаемого макинтоша безмерно разогрет и перегружен, замечательная система MacOS X должна как-то регулировать весь этот беспредел: не давать новым процессам залезть на бедный процессор, чтобы он не сгорел к едрене фене.
А как это сделать? Неужели блочить все новые процессы? А если они системные? Ну тогда надо играть с приоритетом выполнения процесса, но опять же: кому повышать приоритет, а кому понижать? Ведь изначально все процессы УЖЕ запущены с рационально-выставленным приоритетом. Придумывать сложную и прожорливую программу интеллектуального регулирования приоритетов? Вряд ли она сможет эффективно выполняться на перегруженном проце
Так вот без малого гениальные программисты Apple (или BSD?) придумали кернел_таск — процесс-пустышку с высоким приоритетом. По сути, кернел таск — это то, что в винде называется «бездействие системы». Когда системе тяжело и горячо, кернел_таск занимает все ресурсы, но занимать-то занимает, а вот использовать — не использует, даёт охладиться и отдохнуть железу. И ведь за счёт максимального приоритета в критической ситуации ему это прекрасно удаётся! Самое главное, что приоритеты других процессов ни в коем случае не нарушаются, просто кернел_таск появляется с приоритетом «над ними». Выполнив свою работу наш охлаждатель сдувается и бежит вниз списка системных процессов, но стоит только наступить ночи… тфу-у-у-у-у…. не оттуда… Но стоит только системе опять начинать быть перегруженной, наш помощник тут как тут))
Проверено на Эирах обоих поколений, и на C2D 1.8 с HDD и Intel GMA, и на C2D 2.13 с SSD и Nvidia 9400, кернел_таск везде проявляется при перегреве и флэше. Особенно это было заметно в жаркие московские денёчки лета 2010!
Попробовал поставить ноут у окна во время очередного "тупняка" - он быстро остыл и ресурсы высвободились :) То есть взаимосвязь температуры и загруженности я никак не исключаю. По крайней мере сейчас помогает "охлаждение" - по всей видимости, надо бежать за охлаждающей подставкой )
I read several complex ways to stop MRT from excessive CPU usage. (macOS 10.13.6) My quick stop method:
-If you suspect MRT is active go to Applications and launch Activity Monitor. I keep the little CPU History graph in a corner of my monitor since some websites will also eat up the CPU with push ads. If CPU is at 100% look at the Activity Monitor All Processes window and click CPU to verify the problem is MRT.
- In that window double click on an MRT process. A small window opens, click Quit and confirm it by clicking Force Quit.
- Repeat for the second MRT process. Now the CPU History window should show reduced usage.
- I then minimize the Activity Monitor window to the Dock but leave the small CPU History window open to monitor website overloads as well as MRT.
This doesn't solve recurrence; I get it about once ever few months, 4 times so far. I'm hoping MRT does something useful beyond my Malwarebytes A/V.
iMac, macOS 10.13
Posted on Mar 6, 2020 8:06 AM
For the most part MalwareBytes is not really needed. MRT or Malware Removal Tool is part of the built-in anti-malware software of macOS. That said, there should be a reason why MRT is spiking CPU usage given that it is a background process. You might consider removing MalwareBytes temporarily to see if that has any effect on MRT. You can also try running the computer in Safe Mode to see if that affects MRT's spiking usage.
About Using Safe Mode
Boot Into Safe Mode
- If your Mac isn’t already shut down, then shut it down and wait at least 30 seconds before rebooting.
- Immediately, at or before the chime, press and hold down the SHIFT key.
- Release the key after the Apple logo and progress bar appear.
- Safe mode startup is much slower than normal startup, so be patient.
- When the Login Screen appears enter your admin password. If you use automatic login, then this means you are in safe mode.
Posted on Mar 6, 2020 10:08 AM
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