For those having problems opening wallet on a mac (wallet doesn't even open, icon just bounces once in dock and nothing happens), try typing this in console.

xattr -d -r com.apple.quarantine /Applications/Syscoin-Qt.app

For some reason, some wallets are quarantined when downloaded through Safari. This removes the quarantine of the app and it should open right up. Had this problem with a few other coin wallets.