Photoshop Lag on External Monitor

Discussion in 'MacBook Pro' started by MikeArtworks, Jul 18, 2017.

  1. MikeArtworks macrumors regular

    Jun 1, 2015

    I currently use my MacBook Pro 13 inch with touch bar for everything I do (browsing, movie watching, designing and occasionally gaming).

    I design in Photoshop CC (2017), and it works great when I'm not using my external monitor. Now the problem is that when I use the monitor and I have the Mac in clamshell mode, it starts being really choppy as soon as I use photoshop in full screen. Only when I scale the window down to about half of the screen, it starts running smoothly again.

    I have a fully specced 13 inch 2016 (i7 3.3 ghz, 16gb ram) and I think it should be able to run it.. right?

    Screen: LG 27 inch (usb C) screen 4k.

    So in short:

    When photoshop fills the screen on the external 4k monitor, it is really choppy, even when just adjusting a few shapes. Only way to get it smooth again is to make the window smaller, so scale the window down.

    Any idea what I can do?

  2. MikeArtworks thread starter macrumors regular

    Jun 1, 2015
  3. Samuelsan2001 macrumors 604

    Oct 24, 2013
  4. MikeArtworks thread starter macrumors regular

    Jun 1, 2015
    Thunderbolt 3..

    I can have a 4k video running on the monitor and doing photoshop full screen on my laptop without lagging, but as soon as I full screen photoshop on the monitor, it becomes really choppy, even when the macbook (pro) is closed..

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