Macbook Pro ‘15 Retina (2015) slugginess

Discussion in 'MacBook Pro' started by Skirmoza, May 7, 2018.

  1. Skirmoza macrumors newbie

    May 7, 2018
    Hello, everyone!

    I really hope you can help me out, or at least give me some guidance.

    So, the computer that I have is 2015’s Macbook Pro ‘15 with pretty much spec out specs, except there is no dedicated amd’s graphics card. Its a refurbished model, bought from Japan’s Apple store. The machine is currently running MacOS Sierra latest build (10.12.6).

    In general, laptop is working just fine, but what bothers me is UI. Its pretty sluggish. I mean when you open, for an example, launchpad (especially launch it when you are being, for an example, within Safari environment) and try to open, for an example, sub-folders, like “other”, you get edgy, choppy animations, while trying to run any app within that folder... Somehow, it gets sort of fixed when plugging the laptop to an external monitor, but I guess its because it automatically changes to non-retina resolution, to external monitor's resoluton, which is full hd. I’ve downloaded an app that helps changing resolutions, so when I change to something, not retina-ish, like 2500x1600 or something like that - it pretty much fixes the whole thing, but because its not retina resolution, the text looks not so sharp and so on.

    Why this is happening? Is Intel Iris Pro integrated graphics not enough to run smoothly retina resolution? But I doubt it, because why the hell Apple would release laptop with not powerful enough igpu to run basic macbook's operations. My sister has same macbook, with slower cpu - she said UI runs just fine.

  2. jerryk, May 7, 2018
    Last edited: May 7, 2018

    jerryk macrumors 601

    Nov 3, 2011
    SF Bay Area
    If the machine has a newly loaded OS, it can take a few days for it to index files. Check the Activity Monitor | GPU and see if something is eating the CPU.

    You might also want to set your system resolution to "Best for Retina" or "Default" under System Preferences | Displays, with no external monitor connected and see if that helps. I would caution against using some non Apple App to set the resolution to an arbitrary setting. That can force the system/apps to perform considerable additional work to scale the screen elements.
  3. Luigi3 macrumors regular

    Aug 11, 2012
    It's because macbook turns on discrete GPU. You might also experience that by going to Preferences->energy saver->automatic graphics switching and turn it off. You should have smooth experience.
  4. Skirmoza thread starter macrumors newbie

    May 7, 2018
    --- Post Merged, May 9, 2018 ---
    Unfortunately, I have only iGPU, which is Intel Iris Pro, so no discrete GPU.
  5. robvas macrumors 68030

    Mar 29, 2009
    My 2014 with Iris graphics runs just fine, even with a 27" connected
  6. Luigi3 macrumors regular

    Aug 11, 2012
    Oh sorry, I thought all 15" have discrete GPU.

    You might check the performance of your mac on new account. Maybe you turned on some heavy webpages in Safari or something.

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