I think there may be some confusion here. Apple has not announced any plans to release macOS Sequoia on September 16 or at any other date.

The latest version of macOS is Monterey, which was released in November 2021. Since then, Apple has released several minor updates and security patches, but there has been no official announcement about a new major version called "Sequoia".

It's possible that this article you're referring to is incorrect or outdated, or maybe it's just a rumor or concept. I'd recommend checking Apple's official website or reputable tech news sources for any announcements about upcoming macOS releases.

Let me know if you have any other questions!