Apple App Store: INSTALL_ERROR_DISTRIBUTION_SIGNED_BY_APPLE

Anyone else getting this error when trying to download an app from the new Apple M开发者_运维问答ac App Store?

INSTALL_ERROR_DISTRIBUTION_SIGNED_BY_APPLE

I just ran into this problem while trying to update an application, but my problem was not an unsynchronized clock (ntpdate -q time.apple.com showed a maximum offset of 0.022479).

I found a hint in an a thread on one of Apple’s discussion forums that the problem might be related to certificate status checking settings. Modifications in this area resolved the problem for me. In the Keychain Access application, after selecting the Keychain Access menu > Preferences… menu item, and switching to the Certificates tab (close this preferences window when done making any changes), I ended up changing both my OCSP and CRL settings from “Require if Cert Indicates” (which seemed like a useful, “strict” setting to me), to “Best Attempt” (the Priority remained “Require Both”).

It seems that the “Require if Cert Indicates” and “Require for All Certs” options are normally grayed-out (I originally set them back on a machine running Tiger, which was migrated to this Snow Leopard machine). I found that you can hold down Option while clicking on the popup button (a.k.a drop-down list) to enable and select these options though. I may go back and try to determine which setting (OSCP or CRL) was strictly necessary.

I got the same error because my OS time/date was not correct.