: macOS 10.12 Sierra reached "End of Life" in November 2019 and no longer receives security updates from Apple. macOS 10.12 Sierra - End of Life - SCS Computing Facilities
Search: "dosdude1 macOS Sierra patcher" — this is the most trusted way to install Sierra on old Macs.
: Open Terminal and run the following command to create a blank disk image of the correct size. mac os sierra 1012dmg download repack
The Ultimate Guide to macOS Sierra 10.12 DMG: Official Downloads vs. "Repack" Risks
How to download old macOS versions: Get Big Sur, Catalina ... - Macworld : macOS 10
Follow the prompts; this will place an app named "Install macOS Sierra" into your folder. Why Avoid "Repacks"?
Apple’s content delivery network (CDN) still hosts the official installer. Use the link below to download the file , the legitimate installer for Sierra. The Ultimate Guide to macOS Sierra 10
: Unofficial installers often include scripts that disable security features or install "backdoors."
People frequently seek out repacks for a few distinct reasons: