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Unreal Engine 4.3 fails to start on Mac OS X 10.10

After Updating to Unreal Engine 4.3 today the Editor hangs on startup while displaying the splash screen. It also shows a popup telling me to update to the latest version of OS X for best performance, which I can't dismiss either. Now, I know that with beta software and all that one has to expect that certain software might not work, especially if it's cutting-edge technology, but maybe this is an easily resolvable problem, maybe via an entry to the ini-file which dismisses the popup or a quick fix to the source which i could apply by myself?

(Note: I'm using UE4.3 on a Retina Macbook Pro 15' Late 2013 w/ nVidia GT 750M graphics, OS is OS X 10.10 Developer Preview 3)

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asked Jul 17 '14 at 12:29 PM in Installation & Setup

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Hey Sonix,

We aren't supporting 10.10 yet and have not been able to test for it yet. You can take a look at this post and see if what you are experiencing is similar:


Please feel free to add to that post if you have additional information. Thanks!

Ben Halliday

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answered Jul 17 '14 at 05:15 PM

avatar image Sonix Jul 18 '14 at 12:49 PM

Yes, that seems to be it, sorry for not discovering it by myself. Will keep looking there and updating when and if something changes. Thanks!

avatar image TommyBear Jul 20 '14 at 09:17 AM

Yep it's the same issue as the one I posted. Trying to isolate what it is on my end, so I can at least give the Epic guys a heads up before release of the OS. The only option at the moment is to run 10.9, or see if the next update fixes the issue. There's a good chance this issue is not limited to UE4 only.

avatar image ZeroEightSix STAFF Jul 21 '14 at 06:40 PM

Looks like 10.10 preview 4 released today solves the problem

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