You can visit Shazam.com directly in any modern browser to identify music playing through your computer's microphone without installing anything. Installation Guide for Windows and Mac Identify a song on Mac - Apple Support
For those on Windows—where a native app is no longer officially supported—the Shazam Chrome Extension is the primary official solution. It works on Chromium-based browsers like Google Chrome, Microsoft Edge, and Brave. Shazam For PC | Download App on Windows And Mac
There is an official native Shazam app for macOS. Once installed, it sits in your menu bar, allowing for one-click song identification or "Auto Shazam," which runs in the background to catch every song it hears for up to five hours. You can visit Shazam