I’m new to PyTorch, installed following instructions using pip3, ran the “tensor” demo OK, but failed on: “from torchvision import datasets”.  I’m running OS version 11.2.1 (Big Sur) and did not install the CUDA package because my macbook doesn’t have an NVIDIA graphics processor.  I would be grateful for hints on how to solve this.  Here’s what seems to be the relevant part of the error message:
ImportError: dlopen(/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/torchvision/_C.cpython-37m-darwin.so, 2): Symbol not found: __ZN6caffe26detail36_typeMetaDataInstance_preallocated_0E
Referenced from: /Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/torchvision/_C.cpython-37m-darwin.so
Expected in: flat namespace
in /Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/torchvision/_C.cpython-37m-darwin.so