Anyone who struggled to download the just-released macOS Big Sur might not be surprised to learn that Apple’s backend systems experienced major problems Thursday. By early afternoon, Apple said it fixed the problem. However, glitches lingered, as Apple admitted late in the afternoon.
“At present, you may see this error message appear when attempting to download macOS Big Sur,” Apple Support said on Twitter. “Apple is aware of this behavior and is currently investigating. Try waiting a while and attempting the download again.”