Apple has always made beta version of its operating systems (both MacOS and iOS) available to registered developers. What was not widely known is that there was also an invitation-only programme for non-developers to get access to pre-release versions of the OSen. This programme has now been opened up for anyone to join.
Here is the link - but I hope you won’t sign up.
Remember iOS 7? Before the thing was even out, it was being lambasted in the press - including the mainstream press - for being buggy and even bricking people’s phones. It turned out that the “bricking" was simply the built-in auto-expiry of the beta versions. Non-developers who had somehow got hold of an early beta but had not kept up with newer version found out the hard way that betas expire after some time. Also, being beta versions, the quality of the software was - guess what? - not up to release standard yet.
In light of that experience, I do wonder whether opening up OS X even further is a wise move on Apple’s part. I really hope that I don’t have to read on the BBC next week that OS X 10.9.9 is really buggy and unstable, or something equally inane.