Apple has re-issued its 10.8.2 update for specific Mac systems after having pulled it over a week ago.
OS X 10.8.2 has been available for Mac systems since mid-September, but in mid-November Apple pulled a specific version of the updater for the 2012 Mac Mini, iMac, and 13-inch MacBook Pro models, resulting in the inability for those with these systems to be updated to the latest version of OS X.
The reasons for the pulled update were not made public. When users attempted to install the Combo updater for OS X 10.8.2 on their systems, the installer gave an error stating the volume does not meet the requirements for this update.
As silently as this update was pulled, Apple has re-issued the update so it should be available for those who have affected systems. With this update available, you can now meet the system requirements for additional updates, including those for the latest versions of Aperture and iPhoto. If you already have OS X 10.8.2 on your system then you do not need to do anything, but if you have one of these systems and have been stuck with OS X 10.8.1, you can now bring your system up to date.
To install this update, check Software Update in your Mac's Apple Menu and apply all available updates there, but it can also be downloaded as a standalone updater from its Apple Support Downloads page. As always, be sure to fully back up your system before applying this or any other update.