How to open Finder
Click the Finder icon in the Dock, choose Finder from the app switcher, or search for Finder with Spotlight.
File Explorer on Mac
What is File Explorer called on Mac?
File Explorer is called Finder on Mac. Finder is the built-in app for browsing files, folders, drives, locations, and connected devices.
Short answer: open Finder when you are looking for File Explorer or Windows Explorer on Mac.
Finder is always available from the Dock and is the main Mac interface for working with files and folders.
What Finder does
Finder lets you browse folders, search files, open documents, use tags, view connected drives, and manage common file locations such as Desktop, Documents, Downloads, and iCloud Drive.
How Callsign helps with the name mismatch
Callsign creates a visible alias named File Explorer in a folder you choose. When you use that familiar name, it opens Finder. The alias is a normal visible file, not a replacement file manager.