Anyone with a trial or illegal copy will get all the new features, including i Cloud photo sharing, Smug Mug integration, and i OS 7 filter support.
9to5Mac theorizes the issue relates to boxed copies of the software not being tied into the Mac App Store system.
A general rule of thumb to go by is, if you’re mid-project/album/symphony don’t even think about updating your OS or your DAW.
It seems that it only took hackers a few hours to figure out how to circumvent the protection mechanisms used by Apple to protect applications from piracy.
All you have to do is find the file hosted online somewhere.
At the end of the day, if your app is popular enough it’s going to end up on a pirated site, but for the time being, by following the instructions above, you can avoid having your app easily cracked with Text Edit.
Once you’ve found the app, all you have to do is install it as you would any other application and then copy over 3 files (and/or folders) from any legitimate download that you’ve made in the App Store — even if it’s a free download (Twitter, for instance).
This method bypasses the app protection mechanism called "Receipt Checking" which is supposed to link Apps purchased to a specific Apple ID.
That'll download to your Downloads folder as a file.
Probably the best advice we can give anyone who is desperate to explore the speed improvements in El Capitan is to download and install on a separate partition, or better still a separate Mac.