There's no need to go all the way back to CS6! You can install any of the versions since then. I mean, CC 2014 had a LOT better caching than CS6 did! See this page for how to install older versions.
That being said, if you post here in the forums with some more specifics, we can try to help you. I haven't had any issues with CC 2017 crashing on my Macs. What, exact, version number are you using? What is your specific hardware/OS setup? What are you doing when it crashes?
Hi Eric R,
Are you still having issues with crashing? Let us know.