Unreal Editor won't launch (OS X)

Development Platform & Builds
, , , ,
1

Greetings Unreal Team,

I cannot get editor to launch on my MacBook Pro (late 2013, 2.6GHz i7, 16GB, GeForce GT 750M 2GB GDDR, OS X 10.9.2).

Unreal Engine.app launches fine, but when I push yellow Launch button, editor comes up very briefly with project selection screen, and then disappears. It leaves no trace in system logs (via console), and logs in ~/Documents/UnrealEngineLauncher/Saved/Logs have nothing interesting. Verifying install succeeds 100%. visible version number is 4.01.

Any help you can provide would be greatly appreciated! It works fabulously on my Windows 8.1 PC, but won’t launch on my Mac.

2

Additional info: if I click on “open” link next to “Content Examples,” editor launches very briefly, with pinwheel, then also exits silently.

3

Aha…narrowed it down further. If I unplug my second monitor and work directly on MBP Retina display, it comes up just fine. But with my second (30" Apple Cinema Display @2560x1600) monitor attached, it refuses to start.

4

I get same silent crash on a 27" iMac i5 2.8 12GB OS X 10.9.2. Removed cable for my second monitor and restarted but crash still occurs. Unreal Engine Launcher loads fine and I also get quick flash of editor if I choose one of example content projects then it disappears. Any ideas would be appreciated and me know if you need me to send a sysinfo report.

5

Hey jonthomason,

Is your monitor connected via USB? If so, you might want to try patch found in this answer:

Hope that helps!

6

This indeed fixed it! problem was that I had a Wacom tablet attached to my monitor’s built-in hub. Disconnecting monitor, of course, disconnected my tablet and then everything worked. Applying patch from thread makes engine boot without removing tablet. Thanks!

7

As mentioned below, USB patch below fixes problem. In my case, it was indeed a Wacom tablet connected via USB hub on monitor. Either removing tablet or applying patch works for me.