HT201177: Get help with video issues on external displays connected to your Mac
Learn about Get help with video issues on external displays connected to your Mac
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Helpful answers
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Jan 17, 2016 1:20 AM in response to BillnJennby lllaass,What app are yo using to play the video?
Is the video file on the Mac (vice streaming from internet)?
Open Activity monitor and go to CPU page. Make sure that under View All Processes is checked. Place it in corner where y can view it. When stuttering what is using CPU
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Jan 17, 2016 11:53 AM in response to lllaassby BillnJenn,It stutters during streaming from any source. The source playing the video utilizes the greatest amount of CPU. Second is the activity monitor itself. Already brought the machine into Apple and we reviewed that possibility. At that time I was directed to restore the machine to factory settings as it may have been caused by the relatively recent El Capitan update, which I have done with zero improvement. I was told at that time that there may be a hardware issue such as my bluetooth card should the reinstall not correct the problem. Evidently I will probably need to send the machine to Apple for warranty repairs if this issue can't be resolved in this support community.
Ive also searched this issue in the community and have discovered a growing number of identical/similar circumstances affecting other member's machines with none being successfully resolved. So, I suppose i'm hoping for a miracle before I reluctantly release my beloved Mac.