now my wallet wont work, it was . and my coins are gone

You wont lose coins because of your config file. You will lose coins if you delete the wallet.dat file
Use your terminal and go to ~/Library/Application/Support/LightCoin/LightCoin.conf
write only 1 line in your Lightcoin.conf with:
addnode=108.61.198.108
open your wallet and let me know. PM me or come to IRC