Yes, if you own Apple hardware that originally shipped with or supports Sierra. Apple’s macOS license allows you to install the OS on any Apple-branded computer that meets system requirements. However, distributing the DMG file (e.g., hosting it on your own website for others) violates Apple’s copyright.
“Installer is damaged” or App Store says installer is unavailable:
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Mac Os Sierra 10.12.6 Dmg File Download
Apple provides DMG files for several older macOS versions through its support website. Apple Support Download the DMG : Visit the Official Apple Support Download Page and select Sierra 10.12 Extract the Installer Open the downloaded InstallOS.dmg Double-click the InstallOS.pkg file within the disk image. Follow the prompts; this will place a new app called Install macOS Sierra Applications Run the Installer : Open your Applications folder and double-click Install macOS Sierra to begin the upgrade process. Apple Support Community Incremental Update (10.12.6)
: Requires version 10.12.5 to be already installed. Alternative for Virtual Machines Yes, if you own Apple hardware that originally
– Once you obtain the Sierra 10.12.6 installer, you can use Terminal commands to create a bootable USB drive for installation on multiple machines.
Apple provides a direct download link for the macOS Sierra installer in DMG format: “Installer is damaged” or App Store says installer
If you have a Windows PC or need the operating system in a raw DMG or ISO format (often used for burning to a USB drive or creating virtual machines using software like or Parallels Desktop ), the official .app installer can be easily converted into a DMG file using the built-in macOS Disk Utility.
No, not for general use. Apple stopped providing security updates for Sierra in 2020. If you must use Sierra (for legacy software or hardware), do not connect the Mac to the internet for sensitive activities (banking, shopping, work communication) unless absolutely necessary. Use a firewall, keep your browser as updated as possible, and be extremely careful about what you download.