Open the Host file:
First, open with terminal:
sudo vi/etc/hosts enter the computer password after entering this line, and then confirm, go to the host file
Then press the I key to enter edit mode and add it on the last line: 23.214.233.166 s.mzstatic.com
When you are finished adding, press ESC to exit edit mode, and then press: Wq Save and exit (Colon also, be sure to enter in English mode to enter)
Finally quit itunes completely and then reopen, you will find the problem solved, rest assured that the above IP address is Apple.
Second, open the hosts file directly into the changes:
Click Finder > SHIFT + COMMAND + G (go to file) address field input: etc/hosts Enter, copy the Hosts file to the desktop, open with a text editor, add, add the said content, and then save, and then copy the modified copies to etc /hosts (in fact, the replacement of the system, the purpose of the copy is because there is no right to directly modify the original file, with the terminal need to add sudo);
In fact, window can also be resolved, but window's host location is not the same, you need to find the host file, and then the same in the last add 23.214.233.166 s.mzstatic.com, save can.
Nslookup www.xxx.com
MAC itunes cannot verify server S.mzstatic/itunes cannot update server solution