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I am on a 2017 MacBook Air, Intel i3, 8GB RAM, I am on Big Sur 11.5.1 and every video, including the video previews for trackpad gestures are stuttering. I have done virus scans with Malwarebytes and it found nothing. YouTube and downloaded content is slow, please help.

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  • If Internet access is slow in general: Does a reboot of both your MBA and your router change things?
    – nohillside
    Nov 10 '21 at 15:03
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Try using Activity Monitor to check if there's something using an excessive amount of your CPU:

  1. Open Activity Monitor.app. You can find it via Spotlight or in /System/Applications/Utilities.
  2. At the top of the window, click the CPU tab.
  3. In the menu bar, click View > All Processes.
  4. Click on the % CPU column header to order the list by current CPU usage.

If a specific app is using a lot of CPU (around 100% or more), try quitting it. If it doesn't respond, try force quitting by selecting it in the list and clicking the Stop button in the toolbar.

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  • Thanks, an Adobe program was hogging all my CPU.
    – marcu
    Nov 10 '21 at 22:19

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