HT201364: OS X Mavericks system requirements
Learn about OS X Mavericks system requirements
Q: "We could not complete your purchase. Unknown error "
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Mar 25, 2014 8:55 AMby Eric Root,Some things to try.
https://discussions.apple.com/message/20506462#20506462
https://discussions.apple.com/message/22235736#22235736
Try resetting the App Store and Clearing Cookies.
Learned from Old Toad
App Store support. There is troubleshooting and a contact link.
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Mar 25, 2014 1:07 PMby Kulyos,I've had exactly the same problem.
I just bought a MacBook Pro Retina 15" Late 2013
OSX Mavericks 10.9.2
(This is my first time with Mac OS.)
When I click to download the App, "We could not complete your purchase. Unknown error " message box immediately pop-up.
I've tried many tricks posted in many articles. But they didn't help!!!
Finally, I accidentally found that it's the wifi-network problem. When I changed the connection from my home wifi-network to the Personel hotspot (3G) from my iPhone, the problem disappeared!!! Don't know why, though. But I guess, it might relate to the router setting.
Tomorrow, I'll test with the wifi-network at my company.
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Mar 25, 2014 6:17 PMby Kulyos,OK, I've tested with the wifi-network at my workplace. Everthing's gone smoothly. I can purchase a (free) App in the App Store without any problem. No "We could not complete your purchase" pop-up anymore!!!
I'll find the reason why I can't purchase an App with via my wifi-router at home.
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Mar 26, 2014 8:18 AMby Kulyos,Actually, I faced that problem once yesterday after I deleted all subfolders under "/Var/Folders". After restarting, I can't access to the MacDesktop. It got stuck at the grey screen continue showing error message. Thus, I have to do recovery boot (command-r) and reinstall OSX.
Come back to the "We could not complete your purchase" problem. Now I found the solution to solve this Thread!!!!
As I guess, the problem is router setting at my home network. The problem disappeared when I changed the DNS server from the default setting (192.168.1.1) to the open DNS from google (8.8.8.8 and 8.8.4.4). I guess, there might be something weird with my ISP (in Thailand).
Now I can purchase any App from the App Store.
I hope this will help you and others.
Cheers!
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Mar 26, 2014 8:25 AMby Kulyos,Additionally, to change the DNS server,
1) Click the wifi icon on the upper right
2) Click Open Network Preferences...
3) Click Advanced
4) Click DNS
5) Click + and type 8.8.8.8
6) Click + and type 8.8.4.4
7) Click+ and add other DNSs if you need including your default one!
8) Make sure that 8.8.8.8 is at the first rank.
