video playback is way too fast

I have never had such issue before, my 2011 imac has never had this issue. my Macbook Pro, running Mojave, doesn't have this issue.


but on my Imac Pro, Sometimes out of nowhere, the playback from a video, starts to speed up a lot. To the point that it exceeds the Time limit by LITERALLY A Day. Here is a screenshot of it.


Yeah, like seriously. I Start playing the clip at 00:00 and instantly it jumps to that.

It doesn't just occur with Youtube, it occurs with every single video format out there. Even video editing software like the adobe cc package. Except for Quicktime Player, with Quicktime player it does instantly jump to the end, but without exceeding the time limit.


This problem is Instantly resolved by restarting my computer. But after like a week or more, the problem comes back.


If anyone has any suggestion of how to fix this issue, Please tell me. I Cannot find anything about this problem, and i even already got an expert in IT To look at it without result.


Thank you for your time.

iMac Pro, macOS 10.14

Posted on Jun 28, 2019 4:45 AM

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Jun 28, 2019 5:12 PM in response to Jim_veens

Hi Jim_veens,


Welcome to Apple Support Communities. I understand that your iMac Pro plays videos faster than expected in multiple apps. I’d love to share some information with you that should help.


First, make sure that peripherals other than a mouse and keyboard are disconnected from your Mac to test the issue. Also, ensure that all other apps are fully updated and compatible with macOS Mojave.


Next, I recommend completing each step in the following support articles:

  1. Use safe mode to isolate issues with your Mac
  2. How to reset the System Management Controller (SMC) on your Mac
  3. Reset NVRAM or PRAM on your Mac
  4. How to test an issue in another user account on your Mac


Have a great day.

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video playback is way too fast

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