late 2013 macbook pro(iris) fan goes into jet mode when watching nectflix

Discussion in 'MacBook Pro' started by Harry-70, Aug 10, 2014.

  1. Harry-70 macrumors newbie

    Aug 6, 2014
    hi so i was watching netflix on my macbook on chrome today and i noticed that the fan goes crazy loud is this normal?
  2. GGJstudios macrumors Westmere


    May 16, 2008
    If you're not already doing so, use iStat Pro (free) or iStat Menus ($16) to get accurate readings of your temps, fan speeds, etc., rather than relying on your sense of touch or sound. A forum member has posted a copy of iStat Pro that has been "tweaked" to enhance compatibility with recent OS X versions. You can download it here.
    The Intel processors used in Macs are designed to automatically shut down to prevent damage if they truly overheat. CPU Tjmax = 105C (221F), GPU Tjmax = 100C (212F) on i3, i5, i7 processors. (Source: Intel)
    Unless there is a rare defect in a Mac, most temps are well within the normal operating range, considering the workload being put on it. Websites with Flash content, games and other multimedia apps will put higher demand on the CPU/GPU, generating more heat. This is normal. If you're constantly putting high demands on your system, such as gaming or other multimedia tasks, expect temps to rise and fans to spin up accordingly. It's just your Mac doing its job to maintain temps within the normal range.
    It is also quite normal for your Mac to become extremely hot to the touch during intensive operations. The aluminum body transfers heat more effectively than other materials used in computer casings, so you will feel the heat more. This doesn't indicate that it's overheating and will not harm the computer to be hot to the touch.
    Your fans are always on when your Mac is on, spinning at a minimum of 2000 rpm (for MBPs) or 1800 rpm (for MBAs, MBs and minis). iMacs have 3 fans with minimum speeds in the 800-1200 range. They will spin faster as needed to keep temps at a safe level. If your fans are spinning up without increased heat, try resetting the SMC. (PRAM/NVRAM has nothing to do with these issues, so resetting it will not help.)
    The intake and exhaust vents are in the back of the computer near the hinge on all Mac notebooks (except the new MBP with retina display, which has intake vents along the sides at the bottom). The iMac vent is a slot on the back near the top of the computer. Make sure the vents remain unblocked to allow your computer to perform at its best. For Flash-related issues:
  3. The Unseen macrumors member

    The Unseen

    Jun 24, 2012
    Naples, Italy
  4. yjchua95 macrumors 604

    Apr 23, 2011
    GVA, KUL, MEL (current), ZQN
    Don't use Chrome. It's the worst browser you could possibly install on your Mac, because it's a massive resource hog.

    Use Safari.
  5. NovemberWhiskey macrumors 68030


    May 18, 2009
    Typically streaming video content will cause your laptop to run hotter, and it is not uncommon for the fans to reach their highest speeds. At least in my personal experience.


    Is it really? What resources particularly?
  6. Sheza macrumors 68000


    Aug 14, 2010
    Cambridge, UK
    I hear CPU.
  7. yjchua95 macrumors 604

    Apr 23, 2011
    GVA, KUL, MEL (current), ZQN
    The CPU.

    Chrome also seems to like forcing the dGPU to be active.

    Netflix doesn't seem to ramp up the fans on Safari in my case.
  8. ha1o2surfer macrumors 6502

    Sep 24, 2013
    Using Netflix in chrome only yeilds 8-12% CPU usage normally for me. Check to make sure you are not blocking any fan ports and that they are free of dust.
  9. x3n0n1c macrumors regular

    Jul 9, 2014
    Yes it is. Netflix uses silverlight to run, which is awful on OS X. Couple that with it having to scale to retina resolutions and you get a lot of heat output.

    Only thing you can do to help is to use an app like RDM to lower your display resolution while you watch the video. This will lessen the load on your system and reduce the heat generated.

    OS X 10.10 Yosemite will allow netflix to run unsing HTML 5 instead of silverlight, this will completely solve the issue.
  10. awests macrumors regular

    Jul 24, 2014
    Bay Area, CA
    Yosemite's HTML 5 for netflix is so much better than silverlight! My fans don't spin up and temps don't go over 130°F when watching full HD.

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