I can do that too, but the one update it tells me I need must be some sort of system update because I can't tell by looking at the "Purchases" list what needs updated. This is very frustrating and I'd really like to avoid doing a full Mavericks reinstall.It's weird that I can still download and update apps manually from their respective store page and purchase tab.
Still cannot see the updates..... someone help
if you have used the 10.9 developer version check if the Apple ID from the developer version matches your Apple store ID. Log into the store with the ID from the developer version, the update should show up.
https://forums.macrumors.com/posts/18201278/
Thanks to dzejms, pressing alt while launching MAS restore the update pages.
Hurray!
For those with issues I worked out how to get from the first GM to final Mavericks direct from the App Store without a second Mac/friend/etc.
1. Launch the App Store app
2. While its running, edit /System/Library/CoreServices/SystemVersion.plist
3. Change the version numbers to 10.8 for both and save.
4. Switch back to App Store, click on the big Mavericks Banner and it should say Free Upgrade rather than "Install". Click on it and itll ask for your Apple ID and associate it to your account. Now it should show up in your Purchase History, etc.
5. Now you've "bought" it, you can change your version numbers back to 10.9. Quit and relaunch App Store.
Make sure you launch the App Store first though. If you change your version number first it'll refuse to launch.