Hello - I am in the process of purchasing a refurbished Mac Pro Quad (2012) that is pre-installed with OS 10.11. All of my software on my current Mac Pro Quad is running on 10.8. Question is - are there any hardware components that will dislike me reformatting the 10.11 back to 10.8? My software consists of CS6 and prepress software purchased through a business closing auction. Updates are difficult to come by - not impossible, just difficult. It would seem I could install or reformat a drive with 10.8 and it should take right off.