Macs running MacOS 27, called Golden Gate, have a new shortcut that lets you ask Siri about whatever is on your screen. Press Shift+Command+Spacebar and a small "Ask Siri" box opens. Type a question, and Siri answers about the window you have open.
How it works
The feature uses Visual Intelligence, a set of Apple AI tools that can identify objects in photos or on screen. Open the image, file or document you are curious about, press the shortcut, then type your question. With a plant photo open, asking "what type of plant is this" brings back a name and a description. Asking "describe this" on a picture of an Apple II correctly identified the old computer.
It also works on files. Select something unfamiliar in Finder, the Mac's file browser, and ask "what is this". The writer at OS X Daily used it to identify a system daemon, which is a background program, inside a system folder.
What to know
The shortcut only works on MacOS 27 or newer. The reviewer says every test gave accurate and useful answers, but that is one person's experience. The article does not say which Macs support it, whether it costs anything, or how your screen content is handled in terms of privacy. Spotlight's "Ask ChatGPT" option can do something similar if you give it an image.
The takeawayIf your Mac runs MacOS 27, Shift+Command+Spacebar lets you ask Siri about the window in front of you, though privacy details are not covered.