The Cupertino, Calif., company updated its online status page to show that several services were still affected as of 8:45 a.m. Pacific time. The problem began around 2 a.m.
"Multiple Store Services -- all users are affected. Customers may be unable to make purchases from the App Store, iTunes Store, iBooks Store, or Mac App Store," the company wrote.
Update: Apple's services appeared to be operating normally again by early Wednesday afternoon. The company blamed the earlier problem on an internal DNS error.