Mavericks Safari Youtube Videos only 360p?

Discussion in 'OS X Mavericks (10.9)' started by SSD-GUY, Dec 8, 2015.

  1. SSD-GUY macrumors 6502a

    Sep 20, 2012
    London, UK
    Hi all

    I understand that Safari on Mavericks only supports up to 720p, and do get 1080p/4K etc you need to upgrade to Yosemite, however, only 10.9.5 machine, I only get unto 360p.

    Now here's the weird part, if I set Safari to private browsing, the 720p option becomes available (as well as 240p)

    Does anyone here know of a fix? I'm on the latest version of Safari available for Mavericks as there are no more updates remaining.

  2. redheeler macrumors 603


    Oct 17, 2014
    Try this: In Preferences > Privacy, under "Cookies and other website data" hit Details, select, and hit Remove.
  3. jerwin macrumors 68000

    Jun 13, 2015
    Some years ago, I had flipped on a Debug optiopn in Safari which essentially disabled anything over 720p. Couldn't figure out what was causing it-- chalked it up to having an old machine, and used firefox when I had a need for higher resolution video.
    The bug then followed me to my iMac 5K. At which point, I stated going over those preferences with a fine toothed comb.

    I would suggest making a new account-- even one of those Guest accounts, and view a Youtube video--- see you can get high resolution graphics.

    Also, check out

    This is my result with OSX 10.11.
    Screen Shot 10.png

    You could always change the user agent to something akin to Firefox's--IIRC, that lets youtube use the flash player.
  4. SSD-GUY thread starter macrumors 6502a

    Sep 20, 2012
    London, UK
    Hi guys,

    Thanks for all your replies. I have managed to fix it.

    Firstly, I cannot update to the latest version of OS X due to certain programmes that I use (statistical analysis) only being supported at Mavericks at the moment with the licence I've paid for. Anyhow, let's get on to the fix.

    Firstly, I made sure I had the latest security updates installed. This allowed YouTube to display at 720P within Safari and using the HTML5 player, however after a restart, the options were gone.

    Therefore, I clicked reset Safari, by clicking safari in the menu bar, then clicking 'reset safari'.

    I'm happy to report, Youtube at 720p now works.

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