OS X hash with hashcat?

Okay, so I have a hash that I extracted from a plist and followed this guide

I've looked all over, and I can't figure out a few things:

1.) What is wordlist.txt and where do I find it?

2.) When I run the command without that part, it says that it can't find the hash part. Do I need to convert the .txt file into a .hash file, and how would I do that?

Can anyone help me answer those?

Edit: I suck at formatting