Hey there.

I cloned the GH repo and tried to build for OSX via Esenthel builder.

Results in error:
   

This is on OSX 10.14.6

(I've build the builder and the engine.a successfully myself now
and try to build everything through the manually compiled builder.
Seems to be stuck right now though. The Windows builder works normal.)

I've tested, and I can't run it either, even though the hash is the same that was used for upload, which probably means it has something to do with permissions/mac restrictions.
I can run the file compiled on my computer, but after upload and download the same file, mac complains about permissions. Personally I can't look into that at the moment.

This is usually an issue with Gatekeeper; to circumvent Mac's Gatekeeper, I would try a right click (or ctrl + click) on the Builder and then "Open".

If this does not work, you can go to System Prefs -> Privacy and Security -> verify if the EE Builder requests permission there.