Problems with Installed version, and to create or open in Mac

Hello, I have a Mac with OSX 10.11.15, 16 GB RAM.

I’m having an issue since version 4.11. I downloaded the las version of Unreal Engine 4.12.2, I installed then launched. But I can’t open or create a new project. The message is there is “Failed to open file -PATH-”

If I try to create a new project, I got the message “Error writing the output file -PATH-”

And, when I close Epic Launcher, and re-open the Launcher, I don’t have installed the Unreal Engine, the option I have is to Install, not to open.

So, is this a common problem ?
Is there any solution ?

HI KuristutianVjagura,

I’m sorry that you are having an issue with the Epic Games Launcher. In order for us to offer the best support, we have recently modified the process for how Epic Games can help troubleshoot your Launcher issue. Please visit for technical support, here you can find information and solutions for common issues, as well as a contact form if you still need additional assistance. Thanks!