In XCode clang 11 (c++) I get: No template named 'initializer-list' in namespace 'std' How do I get XCode to work? When someone on my team executes: /Applications/CLion.app/Contents/bin/cmake/mac/bin/cmake .. -G Xcode using XCode 10, and then opens the xcodeproj folder, Xcode starts and everything compiles. In his project.pbxproj file are: OTHER_CPLUSPLUSFLAGS = "-std=c++11 -pthread -fstrict-aliasing -Wall -Wcast-qual -Wextra -Wformat -Wpedantic -Wswitch-default -Wno-unknown-pragmas OTHER_LDFLAGS = " -Wl,-search_paths_first -Wl,-headerpad_max_install_names	$HEAD/sdsp/metrics/test/build/sws-metrics/Release/libsws-metrics.a"; It does not work for me when I do this using: _Apple clang version 11.0.0 (clang-1100.0.33.17) _I get compiler errors: No template named 'initializer_list' in namespace 'std' and A space is required between consecutive right angle brackets (use '> >') My OTHER_ variables are blank. I tried setting these to be like his- it didn't help. In the project I tried all the various options for Apple Clang - Language C Language Dialect - Compiler Default, c11, gnu11 Apple Clang - Language - C++ C Language Dialect - C11 [-std=c++11] (and gnu11 and the 14 and 17's) C Standard Library - Compiler Default, libstdc, libc++ Apple Clang - Warnings - C++ Using C11 extensions in earlier versions of C - was No, I also trie Yes Nothing works. We both create the makefiles from the same folder with: /Applications/CLion.app/Contents/bin/cmake/mac/bin/cmake .. -G Xcode I also tried the 3.17.0 cmake I had in homebrew, and after upgrading it to 3.18.1. No difference. Any idea what to do? (I have an old XCode10.3, but it won't run- it tries to "install additional components" and fails...) What am I missing, or is XCode 11 broken?