The new wallet has been tested and run successfully on Mac OSX Sierra
If you are running a previous version of the wallet please back that up first.
Download the self executing DMG from here
Double click the downloaded DMG file. Wait for the wallet to sync.
If you are having problems connecting. Open the console from the help menu and manually add nodes by typing in:
addnode 126.96.36.199 add
addnode 188.8.131.52 add
addnode 184.108.40.206 add
addnode 220.127.116.11 add
addnode 18.104.22.168 add
addnode 22.214.171.124 add