I re-initiated the XCode update on the factory-south-macos build machine.
Once this is done I will start the Qt build using 5.15.0 branch doing the following:
$ ./Build-qt.sh -s macosx10.14 -d 10.13 -j 4
[...]
This script will build Qt for Darwin system
QT_VERSION : 5.15.0
OPENSSL_VERSION : 1.1.1d
[...]
Script options (macOS):
-a OSX architectures ............................ x86_64
-d OSX deployment target ........................ 10.13
-s OSX sysroot .................................. macosx10.14