YouTube Causing UI System Lag

Discussion in 'iMac' started by Tucom, Jun 27, 2016.

  1. Tucom macrumors 65816


    Jul 29, 2006
    It was so bizarre - there's only one channel I've come across on YouTube that does this. Basically once clicking on this channel (GameRiot) - everything runs considerably slower and lag arises; YouTube red page loading progress bar chugs at a lower frame rate, and switching between full screen apps using my TrackPad 2 sometimes freezes completely.

    This is the channel -

    Does this happen for anyone else? Running a year old 2015 Retina 4K iMac Core i5 3.2Ghz SSD and Iris Pro GPU.
  2. Samuelsan2001 macrumors 604

    Oct 24, 2013
    It's fine on my iPad.
  3. Tucom, Jun 28, 2016
    Last edited: Jun 28, 2016

    Tucom thread starter macrumors 65816


    Jul 29, 2006
    Not iPad - iMac, or any Mac running El Cap.

    UPDATE - Seems to be a Safari-only thing; runs totally fine on Google Chrome. Really weird, literally causes the whole Aqua UI to lock up and freeze for moments at a time.
  4. BigJohno macrumors 65816

    Jan 1, 2007
    San Francisco
    Youtube on Safari has always been crap. Hope something changes with Sierra.
  5. maflynn Moderator


    Staff Member

    May 3, 2009
    It does seem a little laggy on my iMac (and safari), I recommend using chrome for this channel, if the performance is too frustrating
  6. miffytherabbit macrumors newbie


    Jan 28, 2016
    Weirdly this happened to me today too. It only happened on the GameSpot Youtube channel (I was watching a review). I tried to go full screen and the whole thing locked up for about five seconds. It started again suddenly, but every time I toggled the page to full screen and back it locked up. I was so worried about that I ran a diagnostics check, but it came back fine. It's even stranger coming across your post today, as I'd never even heard of this issue before, let alone experienced it myself.

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