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Fixed in Unity 4.3.4



Found in


Issue ID




Maverick and Unity performance issues




Priority: 2Necessary for shipping a final release


Severity: 1Crash, freeze, data loss, work stops

On some Mac's with OS X 10.9 Unity performance is very bad, including stuttering, editor freezes, editor lags and similar.

We found that there seems to be a leak in Maverick's OpenGL ARB VBO implementation.
Our text rendering creates and destroys a lot of VBO's so it is most likely that this happened after around 10 minutes of working with Unity and the inspector or other text heavy components in unity uploading a lot of geometry.

Terrains will be especially affected, but of course just loading a scene / unloading a scene will load / unload VBO's for all the meshes too.

This issue has been fixed with a workaround in 4.3.4. We are working with Apple to get a proper fix done, at which point we will be able to remove the workaround.

Comments (117)

  1. 8f879d69219f0f880b8a1deda5232f02?d=mm

    Valdemars Magone

    Jan 21, 2014 09:41

    After the latest 4.3.3f1 update on Mavericks freezing is back and even worse than before. Mac freezes for 2-3 minutes. Please fix this! Freezing occurs mostly when I select objects in scene or change active windows of editor.

  2. Ef0c9fdec5e3f83a768ac7a505cb0dce?d=mm


    Jan 20, 2014 21:39

    @QA FOR LIFE, Thomas Petersen,

    Is the OpenGL ARB VBO leak the cause of the Unity seizures issue and the app switching issues? Is this a blanket cause to the many problems described across this thread?

    Most of the iOS developers working with Unity cannot "not use" Mavericks. It's required for publishing against the iOS 7 SDK. An unfortunate and stressful position to be in.

  3. 4992a119a68a33a3ab2611b73da80268?d=mm


    Jan 20, 2014 17:37

    Most of the time I can work fine with Unity using Maverick, but I do experience this:

  4. 22282f70b0d44c824ac7208fe3450432?d=mm


    Jan 20, 2014 13:46

    Yes! OS X 10.9.2beta is notice about OpenGL driver! But before the final version and... latest Mac Pro ;) release, try this workaround prevent freezing on app switching:

    Add a new tap("Profiler" or "Animation") to your "Main Editor Windows".(don't go full screen but you can select "Maximize on Play" if you want)

    Before "PLAY/STOP" your game - Switch/change "Game" or "Scene" tap to other tap.(not closing tap)

    Note : only "Main Editor Windows" will automatic switching tap while hitting play/stop.

    Macmini5,2 (Mid 2011) Radeon HD 6630 OpenGL 4.1, OpenCL 1.2 (OS X 10.9, Unity 4.3.3).
    Unity "quality setting" : > beautiful(shadow is on).

  5. 73d0dfc110482e49eee4c654f970c2a7?d=mm


    Jan 19, 2014 17:02

    Thank you for following up RDM.BOIS. I really appreciate it. Yeah, sounds like my issue is a little different... I've got the periodic (every 3 to 5 minutes) editor lock-up during general use (doesn't really matter what I am doing in Unity), and lock up on app switching... I've tried disabling app nap, hiding the game tab etc. but nothing solves it. Hoping for a fix soon. Completely unusable.

  6. B186b38dc1e8796ee3b997fa6789e3c8?d=mm


    Jan 18, 2014 21:04

    ILPRESIDENTE, from our developer: "You can tell him that, yes, all I did was close the game tab before publishing." It sounds like the problem you're having may be more complex than this, but I hope it helps.

  7. B186b38dc1e8796ee3b997fa6789e3c8?d=mm


    Jan 18, 2014 18:57

    IlPRESIDENTE. I will ask my developer for more insight and post back.

  8. 73d0dfc110482e49eee4c654f970c2a7?d=mm


    Jan 17, 2014 16:22

    @ RDM.BOIS

    Can you clarify the workaround, I'm not sure I understand? Are you simply hiding the "Game" tab before hitting play/pause? Is this stabilizing the editor's periodic freezing, and/or freeze on app switching, or just a fix for freeze on game playback? I've tried keeping the game tab closed/out of focus and its not helping. Sorry, confused and desperate over here.

  9. B186b38dc1e8796ee3b997fa6789e3c8?d=mm


    Jan 17, 2014 15:57

    We have tried HENRYBOON's suggestion (Post: Jan 16, 2014 16:10) on this problem and it has made a substantial difference. Where before Unity was crashing within the browser (Chrome and Safari) within seconds of start, it is now much more stable ... running our application for > 5 hrs before crashing.

    We're not yet out of the woods in that when first starting the app it has still crashed within seconds, but it then seems to stabilize - three times a charm. Thank you Henry.

    I hope Unity and Apple work aggressively to resolve this issue though. We and our members have to be able to rely on the application - the Mac market is an important one for us.

  10. B186b38dc1e8796ee3b997fa6789e3c8?d=mm


    Jan 16, 2014 16:37

    Thank you, HENRYBOON. I'll pass it on to our development team and report back.

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