Why is my UserEventAgent high CPU?

Question

Level 1

1 points

Why is my UserEventAgent high CPU?

Hello Apple Users,

I have a Macbook Pro 13 inch, early 2011. 4GB RAM. It's running the latest 10.8.2 Mountain Lion update (12C60).I just bought a new mouse, the Sharkoon DarkGlider Gaming mouse. It worked perfectly until today.

So, here's my problem:

When I connect my mouse to my Mac, UserEventAgent starts to take my CPU to 95% to 100% in use. The Macbook fan starts to spin really fast, and the system is starting to get a little bit of lag (although I have an SSD). When I disconnect the mouse, it takes 3 minutes and the CPU goes down.

I found this all in the Activity monitor, where I also found out this:

/

/usr/libexec/UserEventAgent

/System/Library/Frameworks/Security.framework/PlugIns/csparser.bundle/Contents/M acOS/csparser

/private/var/folders/68/26ks81xs5vzcfcztcrwf8kxm0000gn/C/mds/mdsDirectory.db

/usr/share/icu/icudt49l.dat

/System/Library/UserEventPlugins/ACRRDaemon.plugin/Contents/MacOS/ACRRDaemon

/System/Library/UserEventPlugins/AirPortUserAgent.plugin/Contents/MacOS/AirPortU serAgent

/System/Library/UserEventPlugins/AppleHIDMouseAgent.plugin/Contents/MacOS/AppleH IDMouseAgent

/System/Library/UserEventPlugins/AssistantUEA.plugin/Contents/MacOS/AssistantUEA

/System/Library/UserEventPlugins/AutoTimeZone.plugin/Contents/MacOS/AutoTimeZone

/System/Library/UserEventPlugins/BTMMPortInUseAgent.plugin/Contents/MacOS/BTMMPo rtInUseAgent

/System/Library/UserEventPlugins/BluetoothUserAgent-Plugin.plugin/Contents/MacOS /BluetoothUserAgent-Plugin

/System/Library/UserEventPlugins/BonjourEvents.plugin/Contents/MacOS/BonjourEven ts

/System/Library/UserEventPlugins/CalendarMonitor.plugin/Contents/MacOS/CalendarM onitor

/System/Library/UserEventPlugins/CaptiveUserAgent.plugin/Contents/MacOS/CaptiveU serAgent

/System/Library/UserEventPlugins/DiskUnmountWatcher.plugin/Contents/MacOS/DiskUn mountWatcher

/System/Library/UserEventPlugins/EAPOLMonitor.plugin/Contents/MacOS/EAPOLMonitor

/System/Library/UserEventPlugins/GSSNotificationForwarder.plugin/Contents/MacOS/ GSSNotificationForwarder

/System/Library/UserEventPlugins/LocationMenu.plugin/Contents/MacOS/LocationMenu

/System/Library/UserEventPlugins/PrinterMonitor.plugin/Contents/MacOS/PrinterMon itor

/System/Library/UserEventPlugins/SCMonitor.plugin/Contents/MacOS/SCMonitor

/System/Library/UserEventPlugins/alfUIplugin.plugin/Contents/MacOS/alfUIplugin

/System/Library/UserEventPlugins/com.apple.SoftwareUpdate.UserNotification.plugi n/Contents/MacOS/com.apple.SoftwareUpdate.UserNotification

/System/Library/UserEventPlugins/com.apple.TimeMachine.plugin/Contents/MacOS/com .apple.TimeMachine

/System/Library/UserEventPlugins/com.apple.bonjour.plugin/Contents/MacOS/com.app le.bonjour

/System/Library/UserEventPlugins/com.apple.cfnotification.plugin/Contents/MacOS/ com.apple.cfnotification

/System/Library/UserEventPlugins/com.apple.dispatch.vfs.plugin/Contents/MacOS/co m.apple.dispatch.vfs

/System/Library/UserEventPlugins/com.apple.fsevents.matching.plugin/Contents/Mac OS/com.apple.fsevents.matching

/System/Library/UserEventPlugins/com.apple.iokit.matching.plugin/Contents/MacOS/ com.apple.iokit.matching

/System/Library/UserEventPlugins/com.apple.launchd.helper.plugin/Contents/MacOS/ com.apple.launchd.helper

/System/Library/UserEventPlugins/com.apple.locationd.events.plugin/Contents/MacO S/com.apple.locationd.events

/System/Library/UserEventPlugins/com.apple.notifyd.matching.plugin/Contents/MacO S/com.apple.notifyd.matching

/System/Library/UserEventPlugins/com.apple.rcdevent.matching.plugin/Contents/Mac OS/com.apple.rcdevent.matching

/System/Library/UserEventPlugins/com.apple.time.plugin/Contents/MacOS/com.apple. time

/System/Library/UserEventPlugins/com.apple.universalaccess.events.plugin/Content s/MacOS/com.apple.universalaccess.events

/System/Library/UserEventPlugins/com.apple.usernotificationcenter.matching.plugi n/Contents/MacOS/com.apple.usernotificationcenter.matching

/System/Library/Extensions/IOHIDFamily.kext/Contents/PlugIns/IOHIDLib.plugin/Con tents/MacOS/IOHIDLib

/private/var/folders/68/26ks81xs5vzcfcztcrwf8kxm0000gn/C/com.apple.LaunchService s-036501.csstore

/usr/lib/dyld

/private/var/db/dyld/dyld_shared_cache_x86_64

/dev/null

count=1, state=0x2

/dev/io8log

->0xfcb24bc03ba955bf

/Library/Caches

count=0, state=0

/private/etc/com.apple.screensharing.agent.launchd

/private/etc

/private

count=0, state=0

/private/var/db/PanicReporter

/private/var/db

/private/var

/private

count=0, state=0

/private/var/db/GPURestartReporter

/private/var/db

/private/var

/private

count=0, state=0

/private/etc

/private

count=0, state=0

/Users/niels97oet/Library

/Users/niels97oet

/Users

count=0, state=0

/Library

count=0, state=0

/Applications

/

/Applications/Utilities

/Applications

count=0, state=0

/Library/Caches

/Library

count=0, state=0

/Library/Preferences/com.apple.AirPortBaseStationAgent.launchd

/Library/Preferences

/Library

count=0, state=0

/usr

Anybody seeing something unusual?

Please help if you've got a fix!

Greetings from Holland, Niels

MacBook Pro (13-inch Early 2011), OS X Mountain Lion (10.8.2)

Posted on Oct 7, 2012 6:02 AM

Reply

Answer 1

Niels97Oet Author

Level 1

1 points

Oct 7, 2012 6:13 AM in response to Niels97Oet

I think a dev could help ^^

Reply

Answer 2

Niels97Oet Author

Level 1

1 points

Oct 7, 2012 6:49 AM in response to Niels97Oet

Update: Other mouses are giving me the same problem 😕

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Answer 3

Linc Davis

Level 10

209,547 points

Oct 7, 2012 8:06 AM in response to Niels97Oet

UserEventAgent process at 100% after...: Apple Support Communities

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Answer 4

Oct 7, 2012 8:06 AM in response to Niels97Oet

Does the problem persist across a safe mode restart?

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Answer 5

Oct 7, 2012 8:07 AM in response to Niels97Oet

Niels97Oet wrote:

I think a dev could help ^^

You won't find one here.

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Answer 6

Niels97Oet Author

Level 1

1 points

Oct 7, 2012 8:09 AM in response to Linc Davis

Thanks, will try USB Overdrive

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Answer 7

Niels97Oet Author

Level 1

1 points

Oct 7, 2012 8:09 AM in response to Austin Kinsella1

If USB Overdrive doesn't work, I'll try safe mode restart 🙂 Thanks for the help so far

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Answer 8

Niels97Oet Author

Level 1

1 points

Oct 7, 2012 8:19 AM in response to Linc Davis

USB Overdrive did not solve the problem...

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Answer 9

Niels97Oet Author

Level 1

1 points

Oct 7, 2012 9:25 AM in response to Austin Kinsella1

Safe mode restart didn't work, I have no clue what to do now 😕

Please Apple, HELP ME!

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Answer 10

Linc Davis

Level 10

209,547 points

Oct 7, 2012 10:09 AM in response to Niels97Oet

If you want help from Apple, you won't get it here. This is a user-to-user forum. Click the Support link at the top of this page to see your options.

If you want help from another user, then boot in safe mode again, and this time check to see whether you still have the problem while in safe mode. Post your results.

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Answer 11

dmdimon

Level 3

856 points

Oct 7, 2012 10:12 AM in response to Niels97Oet

gaming mouses usually have non-standard fast USB polling frequencies. Like a switch on bottom - 125 Hz/1000Hz. Switch it to lowest value you can. 1000 Hz frequency can drive USB mad, especially when non-standard, two-way communicating mouse without drivers already driving it mad.

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Answer 12

Niels97Oet Author

Level 1

1 points

Oct 7, 2012 11:57 PM in response to Linc Davis

Booted in SafeMode (What I think was really really buggy, even if I have an SSD) still got the CPU to 100%...

Reply

Answer 13

Niels97Oet Author

Level 1

1 points

Oct 8, 2012 12:13 AM in response to Niels97Oet

I have fixed it! Here is what I did:

I saw this output of a list of files attached to this process, so I thought, what if I delete one?

/System/Library/UserEventPlugins/AppleHIDMouseAgent.plugin/Contents/MacOS/AppleH IDMouseAgent

This seemed to be the driver for an non-apple mouse, a HID (Human Interface Device) USB driver

This is what the driver contains, opening it in Coda:

System/Library/Frameworks/IOKit.framework (Wasn't that for reading CPU temp?)
HIDHotPlugHandler (Plug USB mouse in, and turn CPU up?)
HIDUnplugHandler (Unplugging USB mouse, and put CPU down?)
com.apple.AppleHIDMouseAgent (That's the drivers name)

I don't know this all, and if it was needed. SO I just deleted the AppleH IDMouseAgent.plugin, and everything is working fine now! Even the apple magic mouse is still working. 😀
(ACTUALLY I DON'T DELETED THE PLUGIN, I JUST MOVED IT TO MY DOCUMENTS FOLDER, JUST IN CASE...)

I hope this helps, and could this have any concequences? Apple does NOT include plugins that can just be deleted, I guess? 😐

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Answer 14

Niels97Oet Author

Level 1

1 points

Oct 12, 2012 7:59 AM in response to Niels97Oet

Still working all okay, definately a fix 🙂

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Answer 15

Mar 16, 2016 10:11 AM in response to Niels97Oet

I am having this issue And have been for a long time. Even unplugging every single device from my iMac, and turning off every Bluetooth device, the UserEventAgent was still taking upwards of 100% CPU!

I tried to delete the AppleHIDMouseAgent.plugin but the system won't let me. I can't even "rm -r" it in Terminal; it gives me protection errors.

I've just rebooted with everything still disconnected… and it's still up there at 99.8%!

Somewhere along the way researching various slow-downs (possibly this issue; it's been while so I don't quite remember) I discovered that Wacom drivers were causing issues. I had disconnected my tablet and seen some improvements, but this time that wasn't helping, so I uninstalled the Wacom drivers. And on the next reboot, the UserEventAgent was no longer at 100%!

We will see if this lasts… but it's worth a try.

-Joseph

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