Pleas can you tell me if Target Staker software will work on a Mac?
No, the software won't work on a Mac OS by default, but you can try using Wine Bottler, an application that was developed to run Windows applications without having the actual Windows OS installed in Bootcamp or Paralells Desktop.
Download the software from the following location (you need a username as well): http://www.bot4us.com/betting-tools/target-staker