What about the Mac App Store download failure? Many of our user friends who use Macs may experience situations where downloading apps in the Mac App Store prompts us to "Try again with the purchased page". Since Apple's App store is in a foreign country, DNS will have a direct impact on downloads and updates if it is not. The following small series to give you a brief introduction to how to solve this problem.
1, in the upper right corner of the screen to find WiFi icon, click to enter the "Open Network preferences."
2, in the Network Settings window, select the currently connected network, and then click on the bottom of the "advanced" button, as shown in the picture
3, then in the Network interface settings interface, click on the top navigation bar in the DNS column, as shown in the picture
4, then in the DNS Settings window click on the lower left of the + button, add a new DNS address.
5, here we recommend that you use the 114.114.114.114 or 8.8.8.8 these two DNS addresses, set a good click on the "Good" button.
6, the last return to the Network Settings window, and then click the "Apply" button, to our previous changes to the DNS settings to save.
7, set up a new DNS address, then try to download or update the application again in the App Store application shop, you can solve the problem.