Currently Being ModeratedSep 23, 2011 7:40 PM (in response to Dirk Vollmerhaus)
Thank you so much, Dirk!!!
I had sent two messages to Apple's help, and neither have been able to solve the issue. I finally clicked through many of the messages from people having the same problem, your post solves it!
Currently Being ModeratedSep 27, 2011 6:20 PM (in response to Dirk Vollmerhaus)
Thanks so much Dirk
I was going crazy trying to understand why both my computers where not able to dowload from the Appstore
You deserve an award!!
Thanks a trillion
I would like to give you Correct Answer but I can't
Currently Being ModeratedOct 6, 2011 4:51 AM (in response to Dirk Vollmerhaus)
Thank you Dirk!!!
Currently Being ModeratedOct 6, 2011 6:10 AM (in response to Dirk Vollmerhaus)
Same problem here, same solution as provided by Dirk. Many thanks, Dirk.
I too wanted to award 10 points for a correct answer, but was not able to do so. I'm afraid you'll have to settle for my sincere gratitude.
Currently Being ModeratedOct 22, 2011 12:35 AM (in response to Dirk Vollmerhaus)
Wow. One of the (few) times something "just didn't work", and there were few pointers on it.
Currently Being ModeratedOct 26, 2011 6:54 AM (in response to Dirk Vollmerhaus)
This worked great!
So here is the path: Open the application "Keychain Access"
Then go to the menu "Keychain Access" select "Prefrences"
Click on the button "Certificates"
Select the drop down box "Online Certificate Status Protocol (OCSP)" change to "Best Attempt"
Select the drop down box "Certificate Revocation List (CRL" change to "Best Attempt"
Thanks again Dirk!
Currently Being ModeratedDec 24, 2011 1:49 AM (in response to Dirk Vollmerhaus)
Thank you too,
i've had the same problem now, but apple was not able to find the issue soon.
After testing my account, apple guided me to this discussion. What sort of problems there can be?!
Thank you again!
Currently Being ModeratedJan 1, 2012 5:06 AM (in response to Dirk Vollmerhaus)
Thank you so much for figuring this out....after so many unsuccessful attempts!
Currently Being ModeratedJan 2, 2012 6:12 AM (in response to Dirk Vollmerhaus)
Thank you very much. I was about to go crazy because I couldn't find a solution for this problem!!!!!
Currently Being ModeratedFeb 13, 2012 8:44 AM (in response to Dirk Vollmerhaus)
I've tried this approach (verifying best-attempt cert access) as well as removing the appstore/* folder in /var and still cannot download Xcode. Platform is Lion. Message is 'product file may be damaged or unsigned' are there any new fixes out there?
Currently Being ModeratedAug 13, 2012 12:44 AM (in response to Dirk Vollmerhaus)
Strangely, this sollution worked for me, but in an unexpected way. I was trying to download a copy of Mountain Lion (having already successfully Moutain Lion) in order to make a recovery drive. App Store kept returning this error. My fix was to change the info in Keychain Access from "Best Attempt" to "Require if Certificate Indicates."
Currently Being ModeratedFeb 19, 2013 7:41 AM (in response to Dirk Vollmerhaus)
Thanks - this worked for me too on Mountain Lion, after unsuccesfully trying the option of deleting all expired or not trusted keychain certificates.