Copy the wallet.dat and that's it, all you need is your private key which is in the wallets.
I have been searching for that file on my mac and can't find it there is a .app file which is the wallet but where does it make and store the wallet.dat file?
Open Finder, choose Go -> Go to Folder (Command+Shift+G) then enter
~/Library/Application Support/
Inside of that folder you will find a folder for each of your clients, e.g.
Bitcoin (~/Library/Application Support/Bitcoin/). In that particular folder you find your desired wallet.dat.