Why does Unreal Editor hang on Initializing?

Mac OSX Mojave 10.14.5

First tried installing 4.24 but kept crashing on launch.
Uninstalled and installed 4.18.3 instead.

However am unable to launch

it always hangs on “Initializing 45%”

Please help.

If it’s when the editor is loading the project, 45% is when shaders are being rebuilt https://forums.unrealengine.com/development-discussion/c-gameplay-programming/40036-unreal-editor-loading-stuck-at-45

Hello,

We’ve recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue.

https://epicsupport.force.com/unrealengine/s/

Thanks