Installing on Mac Error

[tch1001]

Installing on Intel Mac, python setup.py install leads to this error from the ninja subprogress

/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include/machine/types.h:37:2: error: architecture not supported
#error architecture not supported

In total there are 20 errors, resulting in

subprocess.CalledProcessError: Command '['ninja', '-v']' returned non-zero exit status 1. 

and

  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/torch/utils/cpp_extension.py", line 1824, in _run_ninja_build
    raise RuntimeError(message) from e
RuntimeError: Error compiling objects for extension

Any help? Thanks!