Google released a Gemini macOS app that brings its AI onto the desktop, but after I tried it, I found that it works more like a quick-access tool than a fully integrated assistant like Siri.

Apple Intelligence and Google Gemini

Apple Intelligence and Google Gemini
The app runs on recent macOS versions and lets users summon Gemini instantly with a keyboard shortcut. Users can analyze on-screen content with permission and work with files, images, and documents without leaving their current app.
Google frames the release as a way to keep people “in flow” while they work. The broader goal is to position Gemini as a persistent layer across macOS instead of a standalone tool.