Copy and paste the following official Apple command into Terminal:
Double-click the .pkg file and follow the on-screen prompts.
Here's the official compatibility list for macOS 10.12 Sierra. Your Mac must be one of the following models:
When you download the file from Apple, you receive an InstallMacOSX.dmg file. This is an archive containing a package installer, not the actual application needed to create a bootable drive. You must extract the app first. Step-by-Step Extraction download macos sierra 1012 dmg file install
Navigate to the official Apple "How to download macOS" page.
Visit the official Apple Support Download Page for older macOS versions.
Downloading and installing macOS Sierra 10.12 via a DMG file is a common method for users looking to perform a clean install, set up a virtual machine, or revive an older Mac. While modern macOS versions are often updated through the App Store, Apple continues to provide official DMG links for legacy systems to ensure long-term accessibility. Downloading the macOS Sierra DMG Copy and paste the following official Apple command
Once the download is complete, follow these steps to place the actual installer application into your system: Open the DMG : Double-click the downloaded InstallOS.dmg file to mount it. Run the PKG : Inside the mounted image, you will find a file named InstallOS.pkg . Double-click this file. Extract the App : Follow the on-screen instructions. This process does
Once you have the "Install macOS Sierra.app" in your Applications folder, you can use that file to create a bootable USB installer drive. This allows you to perform a clean installation on a formatted drive, or install Sierra on multiple Macs without re-downloading. You'll need an .
At least 2 GB of RAM (4 GB or more is highly recommended) Storage Space: Minimum of 8.8 GB of available storage space This is an archive containing a package installer,
If you prefer not to use the command line, third-party tools like iBoysoft DiskGeeker or EaseUS Partition Master simplify the process.
sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ macOS\ Sierra.app Use code with caution. Copied to clipboard Type your admin password and press to confirm. 4. Install macOS Sierra Restart your Mac while holding the Option (⌥) Select the USB drive labeled Install macOS Sierra Disk Utility
If you are performing a clean install, fixing a crashed Mac, or downgrading your current operating system, creating a bootable USB drive is the most reliable path forward. Prepare the USB Drive
If you have an older Apple ID that downloaded Sierra in the past:
How to Download and Install macOS Sierra 10.12 DMG File Apple officially released macOS Sierra 10.12 in 2016. It introduced Siri to the Mac, optimized storage solutions, and offered seamless integration with the Apple Watch. If you need to revive an older Mac, set up a virtual machine, or create a bootable installer, you will need a clean macOS Sierra 10.12 DMG file.