How do you create a new wallet?
I want a to make/get a new seed
I've used Electrum OSX!
Your wallet is located in your home directory in ~/.electrum
The wallet file is called 'electrum.dat'
If you want to create a new wallet (which will come from a new seed), you can use the terminal to rename the current wallet so the next time you run electrum, it will create a new wallet.
ie:
mv ~/.electrum/electrum.dat ~/.electrum/electrum.dat.old
So you could basically just rename the wallet file that you want to use.