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VTDecoderXPCService sucking up 25-30% of CPU

Anyone else seeing this in your Activity Monitor?


VTDecoderXPCService is running a full 25-30% of my CPU's on quadcore i7 iMac with 8GB RAM.


I have no apps running, yet the service is running like crazy..... any solutions?

Posted on Jul 20, 2011 9:30 PM

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Posted on May 31, 2014 12:34 PM

VTDecoderXPCService, WindowServer, and kernel_task together total are about 70% of a CPU. Furthermore Safari is very sluggish when this happens.


Only Finder, Activity Monitor, FaceTime and Safari are open.


Quit FaceTime, and the problem goes away. Relaunch FaceTime and the problem resumes.

37 replies

Jan 12, 2017 10:01 PM in response to AndrewLih

I'm also having this issue on my Late 2011 MBP 2.5GHz i7, 8GB 1333 MHz DDR3, AMD Radeon HD 6770M 1024 MB. But only when I play 1440HD and 4k videos. As soon as I play a 1440HD video on Quicktime or youtube "VTDecoderXPCService" appears in Activity Monitor at around 100%CPU and if I play a 4k video its around 200-240%CPU. Also the fan immediately kicks on full blast. Anyone have a solution?

Jul 22, 2011 4:49 AM in response to Doug Stringham

I have a different but application-related problem: when I select my Documents folder, I get an "Application Quit Unexpectedly" report that shows the following -


Process: VTDecoderXPCService [551]

Path: /System/Library/PrivateFrameworks/VideoToolbox.framework/Versions/A/XPCServices /VTDecoderXPCService.xpc/Contents/MacOS/VTDecoderXPCService

Identifier: VTDecoderXPCService

Version: ??? (???)

Code Type: X86-64 (Native)

Parent Process: ??? [1]


The Documents folder closes and I can not read it.

Jul 25, 2011 2:30 PM in response to Doug Stringham

OK... I finally discovered the source of the problem.


VTDecoderXPCService is the sandboxing for video content in Lion. All things that are QuickTime related, audio or video, are sandboxed by this service. It just clicked as to what it is. We have iCam for our iPhones. It allows us to remotely view from the webcams on our machines. So... because iCamSource is a QuickTime-related service, VTDecoderXPCService takes over. So when iCam is operating, it's sucking up 25% of the CPU. Which I'm going to report to the developer. :-)

Jan 29, 2012 11:07 AM in response to Doug Stringham

Yes but on my imac (10.7.2), my vtdecoderservice randomly and repeatedly launches the soundtrack of a video of a CNC machine I recorded even though I'm fairly certain I deleleted that! A virus? I've run Sophos, Cleanmymac and Disk Utility (and Mackeeper until I was advised to remove that) and I've restarted with PRAM held down - none of which change this problem. The sound appears weven when there are no other progs running. I'm at a loss how to stop this. Apple: any ideas? Users: any one else had this weird thing?

VTDecoderXPCService sucking up 25-30% of CPU

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