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
Ok, with this and DataSpree on otc's help (who suggested putting the windows machine ip address as one of the addnode things) the transaction has finally shown up on windows. It's unconfirmed still but once it goes through I'll send you both a coin. Thanks.