After installing the new Apple Mac OS X “El Capitan” software, users are reporting that they cannot load any earlier Adobe CS5 software products, such as Photoshop and Illustrator CS5 and many other versions of Adobe’s design software suites. Users are reporting a Java error as seen here:
These users will need to install Java SE 6 Runtime for El Capitan. This error simply means that you will have to downgrade your current version of Java, which is a major part of the Adobe CS5 suite. To download this older version of Java, simply visit our Java download page and download the older Java package, which resides on Apple’s servers.
After you install the Java SE 6 Runtime for El Capitan, your normal Adobe software functions will return, such as Photoshop and Illustrator CS5. Alternatively, you can purchase the newest Adobe Creative Cloud software from here and not have this Java issue.