The Software Update preference offered an update today after the announced release of the second beta but the preference's appearance is unfamiliar - a strange icon, no mention of which beta it is and the 'More info' link is, in fact, a web link which opens https://apple.com in the default web browser (at least someone is working on that - it actually uses the specified default web browser rather than Safari)!
Pressing the Upgrade Now button did result in a 6.45 GB download but the installer immediatly complained about not being able to create (or update?) a recovery partition and quit.
Has anyone successfully installed the upgraded the first beta to the second?
Where is the downloaded installer saved to and is there a published checksum available anywhere to determine if the downloaded item is a valid installer rather than random garbage or a malicious payload?