Hello, I have used two macbook pro over the past few years. I believe one was under snow leopard and the other was under mountain lion. I have just bought a new rmbp 15" 2014. I backed both using time machine. The former computer was foe personal use. Lots of data and some programs. Then, my former workplace bought he one with mountain lion. This one has less data than the previous one. What suggestion do you have if I want to use data and some programs from previous computers？if I use migration, will older version of the iWorks software replace the ones preinstalled on the new computer?