UE4Editor unable to Launch

When attempting to Launch the Editor from the Unreal Engine Launcher application,
I make it to the “Unreal Editor” loading screen. It seems to work, and even shows the UnrealProject Viewer, but then quickly closes itself and re-enables the Launch button in the Unreal Engine Launcher application.

What’s odd is that I’ve got it to work after multiple attempts (I’m simply clicking Launch over and over again). I seem to have better odds of it staying open by launching the Editor through the “Content Examples” open option in the Launcher application. However, upon me quitting and attempting to reopen the Editor, I’m running into the same issue again.

Here are my system specs:
Mac OSX 10.9.2
3.4 GHz Intel Core i7
32 GB 1600 MHz DDR3
NVIDIA GeForce GTX 675MX 1024 MB

Hi Stachmo,

This sounds a lot like another issue we had recently. Try the steps listed here: UE4 failing to start on OSX Mavericks (Assertion failed: Result == 0 @ MacPlatformMisc.cpp) - Platform & Builds - Epic Developer Community Forums to see if it fixes the problem.

Thank you and have a great day,

Awesome! It seems to launch every time now - thanks!