I tried the new Gemini app for Mac - and it's better than the website in one big way

Google has released a Gemini desktop app for macOS (Apple Silicon, Sequoia 15+), bringing website features to the desktop plus a window-sharing capability that lets the app analyze content in open windows; the article explains installation, usage (shortcuts, chat modes, file and photo analysis), privacy cautions about sharing sensitive windows, and notes that the Windows equivalent exists separately.