"connection failed" mac app store

I am also facing the same problem since updated to 10.7.4 and i tried all the above suggetions but those did not work for me, please help me to solve this problem or else can any body guide me how to get back to 10.7.3.

Make sure that your clock is set to "Set date and time automatically" After trying everything else I could find it turned out that my setting for the clock was off and this was what was causing my problem.

Click on the clock in the upper right hand corner of your screen

Select "Open date and time preferences..."

Make sure there is a check next to "Set date and time automatically:"

Good luck.

Go to system preferences, date and time, tick automatically set date and time!

I couldn't log in because my mac was still in last year's time.

I hope this is why all you guys can't log in because this is the easiest fix.

I was having the same problem. Updated from Snow Leopard to Mountain Lion and even though I had a perfectly good internet connection, both the App Store and iCloud were telling me it could not connect.

I followed these instructions: http://b.rthr.me/wp/?p=356

And it solved my problem. But read the instructions carefully and go through each step.

I tried everything in almost every forum, the certiificate setting (class 2 and 3), dumping all kinds of plists, caches, logging in and out of iTunes... And you know what made it work finally? A reboot of the mac. Geez.....

I did this fix and still had no luck...until I got on a different network. Something set by my network administrator is causing all the fuss. It was definitely the 10.7.4 update that instigated it all because everything was working fine before then.

This worked for me as well, I had 4 blue crosses showing. They only disappeared after a shut down & start, rather than a re-start.

One variation I had was that I additionally had to set up a new admin user & delete my old one, sign in then worked perfectly.

I have been frustrated with this problem for the last 6 months & can at last move on to Mountain Lion.

Hi. Same problem of no App Store and other "trust" issues, but a combination of things worked to clear it up.

First I tried the blog post instructions referenced above but they didn't work. Then I tried setting my date and time prefs to automatically update, as mentioned (it had been unchecked), but that didn't work either. I then went at the Keychain Access certificate approach one more time. What I did was not mentioned in the blog instructions, but someone else had mentioned System Roots, so I clicked on System Roots in the left hand column of KeyChain Access, then Certificates below that. I *then* noticed some blue plusses on some certificates I hadn't noticed before, and cleaned them all up (Set them to default, per the instructions). I had thought I had got them all, but I hadn't done the System Roots ones, because they're not mentioned by the blog.

This worked at last. I don't know whether the date thing mattered in conjunction with the rest, but it didn't hurt. Thanks everyone for contibuting.

Safari now presents secure websites correctly and Mountain Lion is now downloading!

Hi, I have had the same issue since Lion. I couldn't upgrade to Mt. Lion. I upgraded after a clean install and it worked until I migrated my applicaitons. Long story... Anyway, I saw your post and when I went into the keychain>system roots/certificates, I also found about 8 blue + certificates. However, when I attempted to change them to "system default" I found they wouldn't "stick". When I'd return and look at them, they had all reverted to "always trust", as before. So then, upon the kind suggestion of my new "best friend" at Apple tech support, we changed them to "never trust". The certificate would change to red, and when I reopened each certificate, they had stayed. Then when I changed them back to "system default" they remained. I rebooted and YEA! now the app store works and I'm downloading updates!!

Yep, I got a new macbook air... my pro works fine..... couldn't connect to itunes store or app store.... tried everything else (as I couldn't go elsewhere to try another network) nothing helped, but then der I tried connecting using my iphone personal hotspot and it worked! Disconnected hotspot went back to home network and walla it SEEMS to be fine now???? Very strange! I've spent hours trying to fix it!

alfredo87, thank you very much. Changing the Class 3 certificates to Always Trust fixed this issue for me. I had deleted all of my certificates and then began manually accepting them when I returned to certain websites (financial, entertainment, etc.). I have also been having a little trouble with the iTunes Store also. So, this seems to have fixed both problems. Wow! Now I have that iPhoto and XCode updates. Nice!

I spent hours looking at certificates, connections, etc., and finally found something that worked for my MacBook Pro running 10.7.5, found here. Instantly fixed my connection issue and I logged right in. FINALLY.

http://www.tonymacx86.com/general-help/64055-mac-app-store-itunes-dont-work.html

August 7th, 2012, 12:57 PM#9

After trying all of the fixes in this blog and a few others outside of this blog, I was ready to erase/reboot the entire computer. And, then... I noticed that the computer date was set incorrectly. I reset the date, and everything worked perfectly.

Note: I'm not sure if the date, along with the certificate reset and cache clear (in combination) helped, but until I changed the date to reflect the actual date/time, the other fixes didn't work.

your solution just saved my life. I installed the latest mac security update from the app store and all my security credentials got screwed up. couldn't download apps, sign into itunes, or even check webmail. almost every site i access daily was getting blocked. thanks to you, this is no longer an issue.

This happened to me too recently, on OS X Mavericks. I tried all the suggested solutions, including Apple's official solution with the blue crosses. The only one that worked was alfredo87's solution, changing the Keychain certificates to "Always Trust". Thanks, alfredo87!