: Install the operating system on multiple Macs without downloading it each time.
: Resolves an issue where the battery would not charge past 1% on certain 2016 and 2017 MacBook Pro models. macos big sur 1121 installer dmg
When users try to download older macOS installers (like Big Sur) via the Mac App Store today, they often encounter errors, "Item Not Available" messages, or invalid checksums. Furthermore, Apple’s standard createinstallmedia command can be intimidating for casual users. : Install the operating system on multiple Macs
: Ensure you have at least 44.5GB of free space for a successful installation. If you specifically need a disk image file
Apple distributes the operating system as an installer application ( .app ), not a .dmg file. If you specifically need a disk image file for virtualization (like VMware, VirtualBox, or Parallels) or for deployment tools, you can build your own using native macOS utilities. Follow these step-by-step instructions in Terminal: Step 1: Create a Blank Disk Image
Download the official package using Apple's direct link for the installer app assets. Open the downloaded InstallAssistant.pkg file.
