Today Apple has released a public beta for the next update of OS X 10.11.0 El Capitan, although the latter hasn't even been published yet. That's got to be a first...

According to German computer magazine Mac & i, updated version 10.11.1 will feature bug fixes and performance improvements which didn't make it into the initial GM release version 10.11.0 (still scheduled for release on 9/30). There's (reasonable) speculation that the first update to El Capitan will be made available only a few weeks thereafter.

I, for one, am willing to wait. There is no technical reason to be an early adaptor of a new major version operating system, ever. My personal experiences with the recent history of new OS X releases (10.9 and onward) tend to support my stance that it's less stress- and painful to wait for the 10.x.1 update, as this squashes the most obvious bugs and broken features of the initial release . But of course, YMMV. Apple testing the .1 update even before the release of the initial .0 version doesn't bode well for the latter, somehow.