UserWarning: Attempted to get default timeout for nccl backend, but NCCL support is not compiled

[maggiedev2024]

I am running this command on my macBook pro:
python train.py /Users/username/Documents/projects/evodiff/config/config38M.json /Users/username/Documents/projects/evodiff/cat

Got this error, can anyone help to resolve it? Thanks a lot!

/opt/anaconda3/envs/evodiff/lib/python3.12/site-packages/torch/distributed/distributed_c10d.py:633: UserWarning: Attempted to get default timeout for nccl backend, but NCCL support is not compiled
warnings.warn("Attempted to get default timeout for nccl backend, but NCCL support is not compiled")
Traceback (most recent call last):
File "/Users/username/Documents/projects/evodiff/train.py", line 454, in
main()
File "/Users/username/Documents/projects/evodiff/train.py", line 75, in main
mp.spawn(train, nprocs=args.gpus, args=(args,))
File "/opt/anaconda3/envs/evodiff/lib/python3.12/site-packages/torch/multiprocessing/spawn.py", line 282, in spawn
return start_processes(fn, args, nprocs, join, daemon, start_method="spawn")
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/anaconda3/envs/evodiff/lib/python3.12/site-packages/torch/multiprocessing/spawn.py", line 238, in start_processes
while not context.join():
^^^^^^^^^^^^^^
File "/opt/anaconda3/envs/evodiff/lib/python3.12/site-packages/torch/multiprocessing/spawn.py", line 189, in join
raise ProcessRaisedException(msg, error_index, failed_process.pid)
torch.multiprocessing.spawn.ProcessRaisedException:

-- Process 0 terminated with the following error:
Traceback (most recent call last):
File "/opt/anaconda3/envs/evodiff/lib/python3.12/site-packages/torch/multiprocessing/spawn.py", line 76, in _wrap
fn(i, *args)
File "/Users/username/Documents/projects/evodiff/train.py", line 84, in train
dist.init_process_group(
File "/opt/anaconda3/envs/evodiff/lib/python3.12/site-packages/torch/distributed/c10d_logger.py", line 79, in wrapper
return func(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^
File "/opt/anaconda3/envs/evodiff/lib/python3.12/site-packages/torch/distributed/c10d_logger.py", line 93, in wrapper
func_return = func(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^
File "/opt/anaconda3/envs/evodiff/lib/python3.12/site-packages/torch/distributed/distributed_c10d.py", line 1368, in init_process_group
default_pg, _ = _new_process_group_helper(
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/anaconda3/envs/evodiff/lib/python3.12/site-packages/torch/distributed/distributed_c10d.py", line 1544, in _new_process_group_helper
backend_config = BackendConfig(backend)
^^^^^^^^^^^^^^^^^^^^^^
File "/opt/anaconda3/envs/evodiff/lib/python3.12/site-packages/torch/distributed/distributed_c10d.py", line 303, in init
supported_devices = Backend.backend_capability[backend.lower()]
~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
KeyError: 'nccl'