A .dmg file is a digital installer format exclusive to macOS, acting as a virtual Apple disk image. When you download software from the Official Epson Store , it usually arrives packaged inside this container.
If you tell me your exact Epson model number (e.g., ET-2800, XP-15000), I can help you: Verify if a particular firmware version is safe Find the correct, tested tools Provide a step-by-step guide for your specific model Let me know how you'd like to proceed ! References epsonxxxdmg verified