Apple no longer signs older versions of macOS (like High Sierra) for standard installation. While you can download the files for legacy hardware or specific recovery needs, you should only get them from Apple’s official servers (via the softwareupdate terminal command or the App Store) or from a trusted backup. Third-party ISO/DMG sites often bundle malware.
Suggest if you're getting a "damaged installer" error. download macos high sierra 1013 iso and dmg upd
To obtain , the most reliable method is to download the installer directly from Apple's official channels. While Apple typically provides a standard installer app ( .app ), you can easily convert this into a bootable DMG or ISO file for clean installations, virtual machines, or repairs on older hardware. 1. Official Download Methods Apple no longer signs older versions of macOS
Before installing, ensure your Apple hardware supports version 10.13. High Sierra generally runs on machines built between 2009 and 2018. Late 2009 or newer MacBook Air: Late 2010 or newer MacBook Pro: Mid 2010 or newer Mac mini: Mid 2010 or newer iMac: Late 2009 or newer Mac Pro: Mid 2010 or newer How to Create a Bootable macOS High Sierra USB Installer Suggest if you're getting a "damaged installer" error
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/HighSierra --nointeraction Use code with caution. Unmount the newly created installer volume: hdiutil detach /Volumes/Install\ macOS\ High\ Sierra Use code with caution. Convert the DMG file into a universal ISO format:
Name the drive: Untitled (this simplifies the Terminal command).
A .dmg is a disk image format native to macOS, often used for distributing software or creating bootable drives for Mac. An .iso is a standard disk image format used for optical discs and is more commonly required for virtualization software like VMware or VirtualBox.