I found the problem. Wait for it... I had an empty CFBundleDisplayName in the Info.plist <key>CFBundleDisplayName</key> <string></string> I just deleted every single line of code/config in the app until I found it :-)

Heres a more detailed log: https://www.jonasmunk.com/public/oo-webkit-log.txt I was unable to upload it here.

I have checked the "Outgoing connections" and other network requests work fine in the app. I was not able to find any webkit crash reports in the Console app. I have tried the following... Check that code is run on the main thread Disabled all custom configurations of the web view Removed embedded pugins Added another wkwebview via interface builder and tried loading apple.com (same error) I can load a web page in minimal test mac app