Crash Immediately after Launch on OSX

I press “Launch” in UE4 Launcher and then a tabbed window pops up and immediately disappears.

I’m running on 10.9.2.



The logs you attached are from the Launcher itself. Could you please attach ones from the editor? You should find them in ~/Library/Application Support/Epic/Engine/Saved/Logs.

Also, please take a look at this thread, maybe your issue is the same as one of reported there:

Thanks! The link you provided mentioned the issue.

I had a PS3 gamepad connected to my Mac via USB. Once I unplugged the gamepad and launched the editor it worked.

Thanks for info! And sorry for inconvenience. As I mentioned in the other thread, I’ll work on a fix tomorrow and will provide you a link to a patch as soon as it’s ready.

You can download a patch that should solve USB crash from Zip file contains an installer that will update the engine. Please note that this is just a quick fix so you don’t have to wait for 4.0.2 release. As such, it’ll be removed if you use Verify Install option in the Launcher.