To succesfully build Qt 5.7 WebEngine on OSX 10.9 with XCode 5.1.1, the following items are required:
- XCode 5.1.1 for the toolchain
- XCode 6.3 for the OSX 10.10.3 SDK
XCode 6.2 which is the last supported version to run on OSX 10.9 does not contain the latest 10.10 SDK (which is 10.10.3, which introduced Force Touch APIs in a patch release, used by Chromium starting with version 49....).
Then do the following steps: