Error while starting bench

Hi ,

I am trying to install erpnext in a new machine. I am using this guide here.

I am getting the below error after bench start,

/Library/Frameworks/Python.framework/Versions/3.7/bin/python3.7: Error while finding module specification for ‘frappe.utils.bench_helper’ (ModuleNotFoundError: No module named ‘frappe’)

I have tried changing the Path for python but its not working , kindly help.

Thanks in advance!