Nightly Version 2ad0757 Fails to compile on Mac OS - ok on UBUNTU 18.11

Error code 65 ...
CompileC build.debug/libmscore/mscore.build/Debug/libmscore.build/Objects-normal/x86_64/synthesizerstate.o libmscore/synthesizerstate.cpp normal x86_64 c++ com.apple.compilers.llvm.clang.1_0.compiler
cd /Users/Ron/MuseScore
export LANG=en_US.US-ASCII
/Applications/Xcode9.4.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -x c++ -arch x86_64 -fmessage-length=182 -fdiagnostics-show-note-include-stack -fmacro-backtrace-limit=0 -fcolor-diagnostics -Wno-trigraphs -fpascal-strings -O0 -Wno-missing-field-initializers -Wno-missing-prototypes -Wno-return-type -Wno-non-virtual-dtor -Wno-overloaded-virtual -Wno-exit-time-destructors -Wno-missing-braces -Wparentheses -Wswitch -Wno-unused-function -Wno-unused-label -Wno-unused-parameter -Wno-unused-variable -Wunused-value -Wno-empty-body -Wno-uninitialized -Wno-unknown-pragmas -Wno-shadow -Wno-four-char-constants -Wno-conversion -Wno-constant-conversion -Wno-int-conversion -Wno-bool-conversion -Wno-enum-conversion -Wno-float-conversion -Wno-non-literal-null-conversion -Wno-objc-literal-conversion -Wno-shorten-64-to-32 -Wno-newline-eof -Wno-c++11-extensions -DCMAKE_INTDIR=\"Debug\" -DQT_CORE_LIB -DQT_GUI_LIB -DQT_NETWORK_LIB -DQT_TESTLIB_LIB -DQT_QML_LIB -DQT_QUICK_LIB -DQT_QUICKWIDGETS_LIB -DQT_WIDGETS_LIB -DQT_XML_LIB -DQT_XMLPATTERNS_LIB -DQT_SVG_LIB -DQT_SQL_LIB -DQT_PRINTSUPPORT_LIB -DQT_CONCURRENT_LIB -DQT_OPENGL_LIB -DQT_HELP_LIB -DQT_WEBENGINE_LIB -DQT_WEBENGINECORE_LIB -DQT_WEBCHANNEL_LIB -DQT_POSITIONING_LIB -DQT_WEBENGINEWIDGETS_LIB -isysroot /Applications/Xcode9.4.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk -fasm-blocks -fstrict-aliasing -Wdeprecated-declarations -Winvalid-offsetof -mmacosx-version-min=10.7 -g -Wno-sign-conversion -Wno-infinite-recursion -Wno-move -Wno-comma -Wno-block-capture-autoreleasing -Wno-strict-prototypes -Wno-range-loop-analysis -I/Users/Ron/MuseScore/build.debug/libmscore/Debug/include -I/Users/Ron/MuseScore/build.debug/libmscore -I/Users/Ron/MuseScore/libmscore -I/Users/Ron/MuseScore/build.debug/libmscore/libmscore_autogen/include_Debug -I/Users/Ron/Qt/5.9/clang_64/lib/QtCore.framework/Headers -I/Users/Ron/Qt/5.9/clang_64/mkspecs/macx-clang -I/Users/Ron/Qt/5.9/clang_64/lib/QtGui.framework/Headers -I/Applications/Xcode9.4.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/System/Library/Frameworks/OpenGL.framework/Headers -I/Users/Ron/Qt/5.9/clang_64/lib/QtNetwork.framework/Headers -I/Users/Ron/Qt/5.9/clang_64/lib/QtTest.framework/Headers -I/Users/Ron/Qt/5.9/clang_64/lib/QtQml.framework/Headers -I/Users/Ron/Qt/5.9/clang_64/lib/QtQuick.framework/Headers -I/Users/Ron/Qt/5.9/clang_64/lib/QtQuickWidgets.framework/Headers -I/Users/Ron/Qt/5.9/clang_64/lib/QtWidgets.framework/Headers -I/Users/Ron/Qt/5.9/clang_64/lib/QtXml.framework/Headers -I/Users/Ron/Qt/5.9/clang_64/lib/QtXmlPatterns.framework/Headers -I/Users/Ron/Qt/5.9/clang_64/lib/QtSvg.framework/Headers -I/Users/Ron/Qt/5.9/clang_64/lib/QtSql.framework/Headers -I/Users/Ron/Qt/5.9/clang_64/lib/QtPrintSupport.framework/Headers -I/Users/Ron/Qt/5.9/clang_64/lib/QtConcurrent.framework/Headers -I/Users/Ron/Qt/5.9/clang_64/lib/QtOpenGL.framework/Headers -I/Users/Ron/Qt/5.9/clang_64/lib/QtHelp.framework/Headers -I/Users/Ron/Qt/5.9/clang_64/lib/QtWebEngine.framework/Headers -I/Users/Ron/Qt/5.9/clang_64/lib/QtWebEngineCore.framework/Headers -I/Users/Ron/Qt/5.9/clang_64/lib/QtWebChannel.framework/Headers -I/Users/Ron/Qt/5.9/clang_64/lib/QtPositioning.framework/Headers -I/Users/Ron/Qt/5.9/clang_64/lib/QtWebEngineWidgets.framework/Headers -I/Users/Ron/MuseScore -I/Users/Ron/MuseScore/build.debug -I/usr/local/Cellar/jack/0.125.0_3/include -I/usr/local/Cellar/portaudio/19.6.0/include -I/usr/local/Cellar/libogg/1.3.3/include -I/usr/local/Cellar/libvorbis/1.3.6/include -I/usr/local/Cellar/libsndfile/1.0.28/include -I/usr/local/include -I/Users/Ron/MuseScore/thirdparty/freetype/include -I/Users/Ron/MuseScore/thirdparty/poppler -I/Users/Ron/MuseScore/thirdparty/poppler/poppler -I/Users/Ron/MuseScore/thirdparty/dtl -I/Users/Ron/MuseScore/build.debug/libmscore/mscore.build/Debug/libmscore.build/DerivedSources/x86_64 -I/Users/Ron/MuseScore/build.debug/libmscore/mscore.build/Debug/libmscore.build/DerivedSources -Wmost -Wno-four-char-constants -Wno-unknown-pragmas -F/Users/Ron/MuseScore/build.debug/libmscore/Debug -F/Users/Ron/Qt/5.9/clang_64/lib -std=c++11 -fPIC -stdlib=libc++ -Wno-inconsistent-missing-override -Wall -Wextra -Winvalid-pch -Woverloaded-virtual -include /Users/Ron/MuseScore/build.debug/libmscore/SharedPrecompiledHeaders/all-azdptbpoupvwngbtbucweihvrjyl/all.h -MMD -MT dependencies -MF /Users/Ron/MuseScore/build.debug/libmscore/mscore.build/Debug/libmscore.build/Objects-normal/x86_64/synthesizerstate.d --serialize-diagnostics /Users/Ron/MuseScore/build.debug/libmscore/mscore.build/Debug/libmscore.build/Objects-normal/x86_64/synthesizerstate.dia -c /Users/Ron/MuseScore/libmscore/synthesizerstate.cpp -o /Users/Ron/MuseScore/build.debug/libmscore/mscore.build/Debug/libmscore.build/Objects-normal/x86_64/synthesizerstate.o

** BUILD FAILED **

The following build commands failed:
CompileC build.debug/libmscore/mscore.build/Debug/libmscore.build/Objects-normal/x86_64/style.o libmscore/style.cpp normal x86_64 c++ com.apple.compilers.llvm.clang.1_0.compiler
(1 failure)
make: *** [debug] Error 65