Downloading operating system files from unofficial, repacked sources poses a severe security risk, as these files can easily be injected with malware, spyware, or keyloggers.
If you want to avoid repacks entirely, here is the legitimate workaround: mac os sierra 1012dmg download repack
Repacking usually refers to modifying and then redistributing. If you simply want to create a bootable installer or similar: : For Macs that originally shipped with Sierra,
Open and paste the following command: sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ macOS\ Sierra.app Press Enter and type your password to begin the process. including macOS Sierra 10.12
: For Macs that originally shipped with Sierra, you can restart and hold Command + R to reinstall the OS directly from Apple's servers [13].
Before I proceed, I want to caution you that downloading copyrighted materials, including macOS Sierra 10.12, without proper authorization or purchasing the operating system from official channels may infringe on Apple's intellectual property rights.