Canon 5D Mark IV, CS6 and an older Mac

Hello! I recently upgraded to a Canon 5D Mark IV. I cannot open RAW files with my current CS6. I also can't seem to upgrade my CS6 (which I had purchased in 2012) with the Creative Cloud. My current iMac is from 2012. My questions is, do I also need to upgrade my computer so that the current version of Photoshop will run and I can eventually open my Mark IV RAW files. For now, I can convert them to DNG, but I would prefer not to add this extra step.