Dozens of countries and regions were affected across North America, Europe, and Asia.
The internal server crash began before 5am (ET), affecting users of all Apple's platforms, including iPhone and iPad, and Macs. In most cases, pages were displaying errors or "temporarily unavailable" notices, while some apps and purchases would not go through at all.
The last instance in which Apple suffered extensive downtime was when a flaw was discovered in its developer portal. The site was shut down for weeks after an "intruder" attempted to take personal information. Many of the site's services were down for extended periods.
There's no indication, however, that the company has suffered a data breach or an attack on its systems.
Apple's App Store and iTunes Store, where the company makes about 6 percent of its global revenue from (according to its fiscal first quarter earnings, generated $4.8 billion in the three months ending December.
Though it's not a perfect figure because that division also includes Apple Pay and sales of Beats accessories, Apple could have lost around $2.2 million for every hour its various stores were down. That said, the technology giant is more than making up for that dip in iPhone sale alone, based on figures from its fiscal first quarter earnings.