Mac Time Machine to a network share

1. Open a Terminal window and paste this

  defaults write com.apple.systempreferences TMShowUnsupportedNetworkVolumes 1

2. Run this script to create a sparse bundle on your Desktop

http://db.tt/TF5nIQ0

3. Copy the sparsefile to the root folder of your network share,

4. Open Time Machine preferences and choose the network share, your backup should start in a few minutes