It is actually very easy to access windows shared folder from a Macintosh computer running mac os, but the prerequisite for this is that both the windows and Macintosh computer must be on the same local network, Once you make sure that both of the system are connected to a local network follow the procedure below on mac os
Open finder and click Go >> Connect To Server
Now in the next window, enter the ip address or name of the windows pc you want to connect with on your local network and click Connect
Now, enter the user credentials required to connect to windows machine
select the shared folder to be mounted to access the files inside them.
I hope you like this small but useful tip for many new mac users like me, you can also read some mac tips we have written here before.