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What is VTEncoderXPCService and VTDecoder under Activity Monitor

VTEncoderXPCService (most times) and VTDecoderXPCService (occasionally) are showing up in my Activity monitor and show using 176 %CPU! and causing the fan to run full blast. Any help would be appreciated.

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Do you add or remove images within the Photo's app a lot?

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I add Photos that I've taken yes.

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VTEncoderXPCService is a file extension for a Photos process. The way to fix this is go into preferences then disable the iCloud Photo Library connection.

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I've de-selected everything under iCloud in Photos and it's still doing it.

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there could be a few apps / programs causing the problem. firefox is a big offender if you have that installed, followed by Photos, messenger, safari or itunes. without seeing the errors its difficult to pinpoint which one is causing the problem. did you install any software prior to this happening? it really sounds like a video encoder is causing the problem.

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I have this same problem and wish I could find how to fix it. I have isolated the problem only to being when I have a browser as the active window and iPhoto open also, such as when I want to put a picture on social media. When I have Safari opened and Facebook, for instance, when I go to choose the picture, the VTEncoderXPCService will go to 335+% CPU and make my fan go crazy. I thought it was a Safari problem, so started using Chrome, but same thing happens when you try to upload a picture to social media using the Chrome browser. I never had this problem until two months ago. Closing iMessage does nothing - I just tried that . Any advice would be so appreciated!

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This just started happening on my 2010 MacBook Pro. I deleted my Photos library because new photos taken on other devices were also not syncing to Photos on my Mac (I use iCloud Photos). I have all originals set to download to my Mac, and after two days they were all downloaded. However, even when there's nothing to sync, if Photos is open the process shows up in activity monitor using around 175% of the CPU, and my fans spin up like crazy. It's annoying and I wish I could figure out why it's happening. I haven't made any recent changes to my setup that I can think of, so it seems like this just started happening out of nowhere.

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Same issue with Safari on 2014 MacBook Air, in Yahoo email attaching pix. Yahoo or iOS opens panel (like Finder panel) and choose Media, Pictures. Attach pix into email. After sending email this process taking about 204% cpu. Closed email and still there, closed Safari and finally went away.

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Tara will be eternally grateful.
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