Fails to install on Apple Silicon (Tested Mac Studio m4 max)

[havokentity]

Describe the bug
On following ml-agents documentation, the installation of ml-agents fails on Apple Silicon.

To Reproduce
Steps to reproduce the behavior:

1. Create conda environment with the appropriate Python with
   conda create -n mlagents python=3.10.12 && conda activate mlagents
2. Clone release 22 mlagents repo
   git clone --branch release_22 https://github.com/Unity-Technologies/ml-agents.git
3. Instal ml-agents environment
   python -m pip install ./ml-agents-envs
4. See error

Console logs / stack traces

Building wheel for grpcio (setup.py) ... error
  error: subprocess-exited-with-error
  
  × python setup.py bdist_wheel did not run successfully.
  │ exit code: 1
  ╰─> [191468 lines of output]

...lots of lines here...
      Traceback (most recent call last):
        File "/private/var/folders/sc/szj0xskd0j7dl7sfsv25kymr0000gn/T/pip-install-kmt3zfp2/grpcio_da20be3150034e0399157b38a246d42f/src/python/grpcio/commands.py", line 280, in build_extensions
          build_ext.build_ext.build_extensions(self)
        File "/opt/anaconda3/envs/mlagents/lib/python3.10/site-packages/setuptools/_distutils/command/build_ext.py", line 484, in build_extensions
          self._build_extensions_serial()
        File "/opt/anaconda3/envs/mlagents/lib/python3.10/site-packages/setuptools/_distutils/command/build_ext.py", line 510, in _build_extensions_serial
          self.build_extension(ext)
        File "/opt/anaconda3/envs/mlagents/lib/python3.10/site-packages/setuptools/command/build_ext.py", line 264, in build_extension
          _build_ext.build_extension(self, ext)
        File "/opt/anaconda3/envs/mlagents/lib/python3.10/site-packages/setuptools/_distutils/command/build_ext.py", line 565, in build_extension
          objects = self.compiler.compile(
        File "/private/var/folders/sc/szj0xskd0j7dl7sfsv25kymr0000gn/T/pip-install-kmt3zfp2/grpcio_da20be3150034e0399157b38a246d42f/src/python/grpcio/_parallel_compile_patch.py", line 58, in _parallel_compile
          multiprocessing.pool.ThreadPool(BUILD_EXT_COMPILER_JOBS).map(
        File "/opt/anaconda3/envs/mlagents/lib/python3.10/multiprocessing/pool.py", line 367, in map
          return self._map_async(func, iterable, mapstar, chunksize).get()
        File "/opt/anaconda3/envs/mlagents/lib/python3.10/multiprocessing/pool.py", line 774, in get
          raise self._value
        File "/opt/anaconda3/envs/mlagents/lib/python3.10/multiprocessing/pool.py", line 125, in worker
          result = (True, func(*args, **kwds))
        File "/opt/anaconda3/envs/mlagents/lib/python3.10/multiprocessing/pool.py", line 48, in mapstar
          return list(map(*args))
        File "/private/var/folders/sc/szj0xskd0j7dl7sfsv25kymr0000gn/T/pip-install-kmt3zfp2/grpcio_da20be3150034e0399157b38a246d42f/src/python/grpcio/_parallel_compile_patch.py", line 54, in _compile_single_file
          self._compile(obj, src, ext, cc_args, extra_postargs, pp_opts)
        File "/private/var/folders/sc/szj0xskd0j7dl7sfsv25kymr0000gn/T/pip-install-kmt3zfp2/grpcio_da20be3150034e0399157b38a246d42f/src/python/grpcio/commands.py", line 263, in new_compile
          return old_compile(obj, src, ext, cc_args, extra_postargs,
        File "/opt/anaconda3/envs/mlagents/lib/python3.10/site-packages/setuptools/_distutils/compilers/C/unix.py", line 223, in _compile
          raise CompileError(msg)
      distutils.compilers.C.errors.CompileError: command '/usr/bin/clang' failed with exit code 1
      
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for grpcio
  Running setup.py clean for grpcio
Successfully built mlagents_envs
Failed to build grpcio

Environment (please complete the following information):

• Unity 6000.1
• macOS 15.5 (24F74) Sequoia
• ML-Agents Release 22

[havokentity]

I found a solution to make it install. Use conda forge before installing ml-agents. Maybe we should update the docs with this?

conda install "grpcio<=1.48.2" -c conda-forge

[frankcholula]

@havokentity Thanks a lot! For some reason I have to lock it to 1.48.2 to get it working.
conda install "grpcio=1.48.2" -c conda-forge

Here's the full reproducible Conda env file here:
https://github.com/frankcholula/FRL-playground/blob/main/mlagents.yml