MBP suddenly went dead slow

yani2k8

macrumors member
Original poster
Sep 13, 2008
99
0
UK
Hi forum

For the past 2 days my MBP would out of nowhere start running really slowly. Like dead slow, the mouse cursor lags and when I type it takes a few seconds for the letters to appear. Then randomly it would go back to normal and then go slow again and so on. A restart doesn't fix it.

It's really weird, I'm only running Chrome and iTunes. That's never happened before, I normally run like 10 things at the same time, including heavy software like PS and it run smoothly.

It's a 2011 15" MBP but the specs are pretty decent and it's usually very fast: 2GHz i7, 8GB ram and 256GB SSD.

I'm attaching a screenshot of activity monitor - I hope somebody can help.

Thanks in advance.
 

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JohnDS

macrumors 65816
Oct 25, 2015
1,185
244
This thread: http://forums.macrumors.com/threads/how-to-solve-kernel_task-high-cpu-usage.1706948/

suggests the following to deal with problems of high memory usage by kernel_task:

1. Go to About this mac under the apple in the upper left and click on More info
2. Click on system report
3. make a note of what it says after Model Identifier
4. go to your master drive – System -Library – Extensions – IOPlatformPluginFamily.kext -Contents – Plugins – ACPI_SMC_PlatformPlugin.kext – Contents – Resources – find the name from step 3 and move it to a folder that you can find again if needed.
3. Restart and you’re done
 

yani2k8

macrumors member
Original poster
Sep 13, 2008
99
0
UK
Thanks, John

I copied the file to my desktop but it won't allow me to delete it from the 'Resources' folder. I get the following message: “MacBookPro8_2.plist” can’t be modified or deleted because it’s required by OS X.