bitsend have no a mac wallet 
don't tell me if you forget a vmware. if you are using mac computer, you can download vmware fusion http://www.vmware.com/cz/products/fusion.html

I'm run a masternode just require a two technical ways, that is wallet problem and modem (port forwarding)

• Wallet
  
  
  • in this example, I'm using Windows XP with RAM 1GB. you can decrease to 526 or 256 MB, because bitsend wallet is not require a much RAM.\
    
  • the configure of wallet like masternode genkey, filling 25000 to your wallet, include turn on a port 8886 you can look in http://bitsend.info/forums/index.php?topic=11.0 page
  
  
  
• PORT FORWARDING
  
  • In this case, I'm using mikrotik
    
  • Go to : IP > Firewall > Tab NAT > Click Add
  • On Tab Action, you fill with information of your computer
  • On General Action, you fill your IP Public and port similar in Tab Action
    
  
  
  
• On your wallet, Go to debug console, give a command "masternode start" and finish
  

be helpful