M277z.7z

Because Windows and macOS do not natively support the 7z format as deeply as they do .zip, you will need a third-party tool to access the contents:

: Once extracted, run the installer and follow the on-screen prompts to update your M277dw or M277n printer. Security Warning: Check Your Source m277z.7z

: Right-click m277z.7z and select "Extract Here." This will usually reveal an .exe (for Windows) or .dmg (for Mac) installer, or a raw .ful firmware file. Because Windows and macOS do not natively support