https://arstechnica.com/gadgets/2024/09/macos-15-sequoia-the-ars-technica-review/

The macOS 15 Sequoia update will inevitably be known as "the AI one" in retrospect, introducing, as it does, the first wave of "Apple Intelligence" features.

That's funny because none of that stuff is actually ready for the 15.0 release that's coming out today. A lot of it is coming "later this fall" in the 15.1 update, which Apple has been testing entirely separately from the 15.0 betas for weeks now. Some of it won't be ready until after that—rumors say image generation won't be ready until the end of the year—but in any case, none of it is ready for public consumption yet.