It appears that transaction isn't being broadcast to the network. Let's get you some more connections.
First, quit out of Bitcoin on the Mac. Then open Terminal and enter these commands:
cd /Applications/
Bitcoin.app/contents/macos/bitcoin -addnode=69.164.218.197 -addnode=64.22.103.150 -addnode=173.242.112.53 -addnode=178.79.147.99 -addnode=184.106.111.41 -addnode=91.85.220.84 -addnode=173.224.125.222 -addnode=86.5.50.90