I've used X2 off and on for the past 4 years and avoided any upgrades. But now my PC (a laptop with Windows 7) is on its last legs, so it's time to make a change. I'm also considering switching to a Mac. Any advice? Here's some of my questions: 
  
1. Will all my older plans files (even back to V9) still be accessible in X6? 
  
2. Will X6 work together with my office PC desktop and a Mac laptop? Can you mix and match PC and Mac operations? 
  
3. Does Chief perform well on Mac? Any glitches? 
  
Thanks for your input! 
CovOps