MAC WALLET--okay, for those having issues with the Mac wallet, you have to download with Firefox! Not Chrome. Not Safari.
For Mac users you have to go to ~/Library/Application Support/Syscoin and remove all the files and directories and the hidden .lock file. All except syscoin.conf and wallet.dat. Then the new 0.1.2 wallet works like a champion. Opening, exiting, reopening; the whole bit.