hey @ C ,
In my case I don’t even see the editor Splash screen and editor crashes without even issuing the Crash log.
I have Nvidia 750m on MBP 2013 i7 2.3 ghz and 16mb ram.
I tried the workaround but it didn’t change anything at all.
I tried to launch only editor from the launcher (without any project)
and it still crashes.
Will be any resolution (patch) on this issue or should I just revert everything back to 4.16 ? (which works perfectly)
Update:
I was able to run UE4Editor.app directly - it opened just fine (which I assume is just a launcher problem P.S. how do I reinstall the launcher without having to reinstall all of the engines versions ?).
I am trying to open my project now:
it trying to compile shaders now - I will update the post once it finishes/crashes 
The Editor started up fine,
HOWEVER - I tried to package my game right away - the packaging process succeed - but the game doesn’t launch at all.
I closed up the editor and tried to launch it again (via UE4Editor.app) and this time the Editor did not launch as it was previously - it immidiately closed without even showing the splash screen.
I tried to relaunch via Launcher → same issue.