The progress bar was a short-lived race. A flicker of blue, a "Mounting" notification, and suddenly it’s a disk on the sidebar. It contains a single package: Install.pkg

Double-click the .dmg file in your Downloads folder to open it.

Since "epson-xxx.dmg" is a placeholder filename (typically representing a macOS driver installer for an Epson printer or scanner), I have created a below. You can replace "XXX" with the specific model number (e.g., ET-2850, XP-6100, etc.) before publishing.

(macOS version). Epson provides .dmg files for drivers, Epson Scan, and firmware updates.