Cubase Student 6.5

Hi. My son has Cubase 6.5 and has acquired a new MacBook Pro. The software on installation said that the operating system was out of date (seems odd on a PC that is newer than the software) so we installed El Capitan and the same message comes up. Someone has suggested that there could be an incompatibility with 32 bit and 64 bit but my son has no clue on what that entails and nor do I. I see there are other posts concerning this issue but there does not appear to be any resolution. Any advice would be gratefully received but we may need some step by step instructions. Thanks so much

Just checked and it is actually called Cubase Artist not student!