How to move individual apps & files from old to new macbook pro
Turn off the 10.8.6 computer.
Connect it to the new computer with either a Firewire or Thunderbolt cable.
Hold T down on the 10.8.6 computer.This will boot it into  Target Disk Mode 
The 10.8.6 computer's disk should now be mounted on the new computer. You can transfer just the files that you want and then unmount the older computer.


Transferring the files with a USB flash drive would work as well.