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Fixed in Unity 5.5.0f3



Found in


Issue ID




UI elements flicker with Editor on a second monitor and Game window on the main retina display

Editor - Other



Priority: 3Not yet prioritized for a release


Severity: 2No workaround

Steps to reproduce:
1) Open the attached project.
2) Place the Editor window on a second monitor.
3) Detach the Game tab from the Editor and place it on the main retina display.
4) Press 'Play'.
5) Click on the Scene view or Game view.

The UI button starts flickering and gets offset from the center of the Game window with each click and then returns.

Reproduced on:
5.5.0a5, 5.4.0f3

Did not reproduce:
5.3.6p2, 5.2.4f1

Machine used to reproduce the issue:
Main display: iMac 27" 5120x2880 (downscaled to 2560x1440)
Second display: 1920x1080

Comments (10)

  1. C55ffbcb705a74889cd8a0e3100ea771?d=mm


    Aug 25, 2018 16:55

    still happening in 2018.2

  2. 6ae419748d2d7a06e40a05a09247a580?d=mm


    Sep 29, 2017 19:30

    This is still happening to me in 5.6.3p1

  3. 429eb71018cf342371f7ee097a941703?d=mm


    Jul 14, 2017 02:07

    This is literally still happening? Is this not even being looked at?

  4. 520a7bbe0121875e85e0c6a4fcb260da?d=mm


    Jun 06, 2017 09:06

    Still occurs for me on Unity 5.6.1p1. Makes working with two monitors basically impossible.

  5. Bb1fdbfd531f63500fa35874b89ae607?d=mm


    Apr 12, 2017 21:29

    This still occurs for me on 5.5.0p1, on Mac OSX El Capitan.

  6. 59c265657bef0b7f0d8cae38ffcb53fa?d=mm


    Jan 07, 2017 12:22

    I have the same issue in 5.5.0f3

  7. Db91b69a9e872dfa46db537403f8d4da?d=mm


    Nov 04, 2016 22:13

    Issue still occurs in 5.4.2f2

  8. E4daa9b72fdbbcfaa612d65feda6442b?d=mm


    Sep 06, 2016 23:21

    To add to this: the flickering occurs when ANY Unity window updates on the laptop's retina screen. For example, it occurs if you move the Profiler to that screen (but keep the Game window on the 2nd screen), or as you interact with any inspector on the laptop screen.

  9. 00f211b673460fa55d1ea8a87ed8e726?d=mm


    Sep 01, 2016 06:40

    Issue still occurs in Unity 5.5.0b1

  10. 95f61b62946ea3c82d904783338eba52?d=mm


    Aug 29, 2016 12:47

    Same issue,

    Using Macbook Pro connect to a 1080p monitor. If Game View is on the 1080p, it's all working fine.

    However, if Game View is dragged over to the laptop's retina monitor (with Retina scale disabled), UI elements move to half of the screen, looks like the dimension calculation between the editor and the game view get messed up. UI elements flicker when in Play mode.

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