YAML build fails in Xcode

Hi everyone :slight_smile: ,
I’m familiar with HTM theory, the various Nupic repositories and have successfully run Nupic using Python bindings (in Anaconda/Pycharm). I now wish to work directly with the C++ code but I’m having trouble compiling parts of nupic.core-1.0.6 in Xcode 10.2 running on OSX 10.13.6 (High Sierra). It fails to build YAML. Here is the error report:

PhaseScriptExecution CMake\ Rules /Users/linda/Dropbox/Nupic_in_Xcode/external/nupic_core.build/Debug/yaml-bundle.build/Script-7EB6A77ACA2B4D52B8B01AF1.sh
cd /Users/linda/Dropbox/nupic.core-1.0.6
/bin/sh -c /Users/linda/Dropbox/Nupic_in_Xcode/external/nupic_core.build/Debug/yaml-bundle.build/Script-7EB6A77ACA2B4D52B8B01AF1.sh

make: *** No rule to make target /Users/linda/Dropbox/Nupic_in_Xcode/ThirdParty/Build/YamlStaticLib/libyaml.a', needed by /Users/linda/Dropbox/Nupic_in_Xcode/external/yaml-bundle_dummy.c++’. Stop.
Command /bin/sh failed with exit code 2

Any advice that can help me fix this problem would be very much appreciated!