After trawling the discussion boards, finding suggestions to…
~ delete all my apps — which makes you have to reconfigure them on the phone. Blech.
~ find the apps with generic icons, which I no longer had after my last purge
…I finally bit the bullet and went through the alphabetical list, comparing all my apps listed in iTunes with those actually downloaded to ~/Music/iTunes/Mobile Applications. Thankfully the one missing started with a “B”. I killed that in iTunes and was able to run “Check for updates” with no error.
Conclusion: Go through the list in iTunes, selecting each app and doing a File > Show in Finder. The easy way to accomplish this is:
- Click on the first app
- Cmd-R to show in Finder.
- If it’s there, Cmd-Tab to go back to iTunes, and right arrow to go to the next app. Go to the top of step 2.
- If it’s doesn’t show in Finder, Cmd-Tab to go back to iTunes, and either delete that app from your list ‘cos you don’t want it anymore, or redownload it from the iTunes Store. Then right arrow to the next app and go to the top of step 2.