Hi Paul, Sarah, and Others, I did some research, and there's an Apple Support document about "Hiding and Unhiding Purchases": http://support.apple.com/kb/HT4928
This is supposed to cover the case where you delete purchases and can't find them again, but it doesn't quite sound like your problem. (Also, the document is dated October 2011, so I don't know whether Mountain Lion changes things). When I tried this on my system (still on Lion) there was, indeed, a "hide" button in the App Store purchases list (column 4 of 5), and pressing it made the item go away entirely (no dimmed button; it simply no longer showed up in the list of purchased items). I was able to unhide items by following the directions in the support document: 1. Open the Mac App Store. 2. Choose Store > Sign In, and enter your Apple ID and password. 3. Choose Store > View My Account. 4. Click on View Hidden Purchases from the Account Information page. This was useful to know and it seems worth posting in case someone else hits this issue, but doesn't seem to fix your problem. My guess is that the preference files for the App Store somehow got corrupted on your system. I'd try quitting all applications, then either deleting or moving the two plist to your Desktop or other location, and rebooting. When you open the App Store again it should recreate the entries with the correct (updated) information. If not, you can always move the old plist files back to their original location. The relevant files are in your user account's Library preferences folder: ~/Library/Preferences/com.apple.storeagent.plist ~/Library/Preferences/com.apple.appstore.plist You probably should quit all applications on your Mac (to include ones that might have been purchased through the App Store), delete or move the two files listed above (e.g., use the Command-Shift-G "Go to folder" shortcut in Finder to go to your Library/Preferences folder). If you do this in one step remember to type the leading tilde character that indicates your home directory, followed by a slash, and then "Library", then slash, then "Preferences". If you do this in two steps, use Command-Shift-H to go to your home directory, then use Command-Shift-G and type "Library/Preferences" into the text field with no slash at the beginning needed -- just the slash between "Library and "Preferences". Once inthat folder find the two plist files to delete or move. Then reboot your Mac and check that your "Purchases" and "Updates" now look correct. HTH. Cheers, Esther <--- Mac Access At Mac Access Dot Net ---> To reply to this post, please address your message to mac-access@mac-access.net You can find an archive of all messages posted to the Mac-Access forum at either the list's own dedicated web archive: <http://mail.tft-bbs.co.uk/pipermail/mac-access/index.html> or at the public Mail Archive: <http://www.mail-archive.com/mac-access@mac-access.net/>. Subscribe to the list's RSS feed from: <http://www.mail-archive.com/mac-access@mac-access.net/maillist.xml> The Mac-Access mailing list is guaranteed malware, spyware, Trojan, virus and worm-free! Please remember to update your membership options periodically by visiting the list website at: <http://mail.tft-bbs.co.uk/mailman/listinfo/mac-access/options/>