Qt 6.0.0 for iOS fails with CMake

Skipping check for license update: Perpetual license.
Running /Users/assam/Qt/Tools/CMake/CMake.app/Contents/bin/cmake -S /Users/assam/Qt/Examples/Qt-6.0.0/quick/window -B /Users/assam/Qt/Examples/Qt-6.0.0/quick/build-window-Qt_6_0_0_for_iOS-Debug -GNinja -DCMAKE_BUILD_TYPE:String=Debug -DCMAKE_SYSROOT:PATH=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk -DCMAKE_C_COMPILER_TARGET:STRING=aarch64-apple-darwin19.6.0 -DCMAKE_CXX_COMPILER_TARGET:STRING=aarch64-apple-darwin19.6.0 -DQT_QMAKE_EXECUTABLE:STRING=/Users/assam/Qt/6.0.0/ios/bin/qmake -DCMAKE_PREFIX_PATH:STRING=/Users/assam/Qt/6.0.0/ios -DCMAKE_C_COMPILER:STRING=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -DCMAKE_CXX_COMPILER:STRING=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ in /Users/assam/Qt/Examples/Qt-6.0.0/quick/build-window-Qt_6_0_0_for_iOS-Debug.
-- The CXX compiler identification is AppleClang 12.0.0.12000032
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - failed
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ - broken
CMake Error at /Users/assam/Qt/Tools/CMake/CMake.app/Contents/share/cmake-3.19/Modules/CMakeTestCXXCompiler.cmake:59 (message):
The C++ compiler"/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++"is not able to compile a simple test program.It fails with the following output:Change Dir: /Users/assam/Qt/Examples/Qt-6.0.0/quick/build-window-Qt_6_0_0_for_iOS-Debug/CMakeFiles/CMakeTmp

Run Build Command(s):/Users/assam/Qt/Tools/Ninja/ninja cmTC_61068 && [1/2] Building CXX object CMakeFiles/cmTC_61068.dir/testCXXCompiler.cxx.o
FAILED: CMakeFiles/cmTC_61068.dir/testCXXCompiler.cxx.o 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ --target=aarch64-apple-darwin19.6.0 --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.0.sdk -mmacosx-version-min=10.15 -MD -MT CMakeFiles/cmTC_61068.dir/testCXXCompiler.cxx.o -MF CMakeFiles/cmTC_61068.dir/testCXXCompiler.cxx.o.d -o CMakeFiles/cmTC_61068.dir/testCXXCompiler.cxx.o -c testCXXCompiler.cxx
error: unknown target triple 'unknown-apple-macosx10.15.0', please use -triple or -arch
ninja: build stopped: subcommand failed.