Fix python release breakages by set MB_PYTHON_OSX_VER (#7038)
Fix python release breakages by set MB_PYTHON_OSX_VER (#7038)



google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf