Apple on Tuesday quietly announced it will release High Sierra, this year's upgrade of the Mac's operating system software, on Monday, Sept. 25.
As has been Apple's habit for several years, the date was posted on the company's website. The news did not rate a mention during the lengthy introductions of the year's new iPhones, the 8 and 8 Plus and the $999 iPhone X.
High Sierra will be the second under the "macOS" brand introduced in 2016, when Apple dropped the older "OS X" and formatted the Mac operating system label to match others in its stable, including iOS and tvOS. High Sierra is also known as macOS 10.13 using the Cupertino, Calif. company's numerical labeling.