Consistent hangs OSX

Hello,

I’m experiencing hangs in UE4.6.1
Any example hangs when played.
Playing in a new editor window works but for example the FPS example hangs when trying to shoot.

OSX 10.10.2
i7 Quad Core 3.69 Ghz
16GB RAM
GeForce GTX 770

There seems to be something fundamentally wrong with my install, can anyone help?

Thanks!

Isjtar

link text

For reference I have updated to the experimental NVIDIA webdrivers which seems to have completely solved the problem.

I second this. http://d.pr/i/1cD4T

It looks like infinite loop or unresponsive code.

Thanks for the nvidia solution. Is it safe to use that driver?

I also confirm that web driver fixes the issue. However, the web driver causes various rendering issues in Epic launcher as well as in UE editor.