I should outline the installation steps step-by-step, using the correct tools for macOS Sierra. Emphasize that it's important to back up data before modifying system kexts. Also, clarify that Seethrough is an older patcher and may not work properly on newer macOS versions, but since they're using Sierra, it should be compatible. Mention the use of a terminal command or a DMG installer. Clarify that "seethrough.mp4" is likely a miscommunication and the actual installer is a DMG orPKG file.