macOS Sequoia will be one of the earliest new macOS launches in over a decade, likely releasing within as little as just a week.
Internal Apple documentation obtained by MacRumors suggests that macOS 15.0 Sequoia will be officially released to the public by mid-September. The release dates of major macOS updates in recent years are listed below:
The release of macOS Sequoia by mid-September this year would be the earliest since OS X 10.8 (Mountain Lion), which was released on July 25, 2012.
The new annual version of iOS has historically always been released at least a week before the new version of macOS. Sometimes, Apple leaves a considerable gap between the releases; in 2020, the company left nearly two months between the release of iOS 14 (September 16, 2020) and macOS Big Sur (November 12, 2020).