I'm getting the "The default location required for this install cannot be found. The install will be cancelled." error from the updater. Many other users experience the same problem. An user posted a possible workaround in Versiontracker.com, but it won't work either in my case. Here's the workaround:
Any thoughts are appreciated.
After updating the OS X "locate" database via the Terminal, the update went flawlessly. To do this, start up Termainal, and at the command line, type this: /usr/libexec/locate.updatedb As it says in the manual for the "locate" command (type "man locate" (no quotes) at your prompt), this rebuilds the locate database, allowing the installer to find your AI 10 application. Good Luck!
Any thoughts are appreciated.