How can you export wifi settings from Windows 7 to an Apple Mac OSX?

Bought a new mac but can't access wireless networks I used to because their passwords are saved on my old pc.

Can wifi names and their passwords be exported from a Windows 7 PC and imported to a OSX Yosemite?

Can this be done locally (without sending the settings over the inteet), e.g. via USB?

I don't know how to write scripts or code but I'm tech savvy - please elaborate if you have a complex solution.

Thanks in advance.