CS8 is really CC 2014, and the fact that you are getting a reference to CS8 makes me wonder if you really are as up to date in CC as you could be.
In any case, if your OS supports CC 2014 it should show in the list at the top of the Apps tab in the CC Desktop Application as available for download and installation if the desktop app is up to date. Use the gear icon to quit the desktop app, then restart and let it update.
CC2014 requires Mac OS X 10.7 and Windows 7 with Service Pack 1.
Be aware that it has been announced by Adobe that future upgrades of Mac OS X will require Mac OS X 10.9 or higher.