The output image will have a .img extension. Renaming it to .iso makes it universally recognizable by virtual machine software.
Apple offers several official ways to get the High Sierra installer:
Sharing a list of where these files are hosted. download macos high sierra 1013 iso and dmg upd
hdiutil create -ov -format UDRW -volname "macOS High Sierra" -size 5g -fs HFS+ -srcfolder /Applications/Install\ macOS\ High\ Sierra.app ./macoshighsierra.iso
Because the official download is an .app file, you must manually create a disk image if you need a .dmg or .iso for other platforms. Download the "Install macOS High Sierra" app. The output image will have a
This guide provides direct resources and step-by-step instructions for obtaining the macOS High Sierra 10.13.6 (17G66) installer files and creating bootable media. Why Download macOS High Sierra 10.13.6?
A physical installer drive allows you to recover systems locally or clean-install the OS onto empty hard drives. You will need a flash drive with at least . How to download and install macOS - Apple Support hdiutil create -ov -format UDRW -volname "macOS High
Although Apple no longer actively supports macOS High Sierra with security updates, the operating system remains accessible for legacy users and specific technical workflows. By using the official Mac App Store links or trusted third-party tools, you can acquire the OS safely. Whether you need the software as a DMG, an ISO for virtual machines, or a USB flash drive to restore a vintage MacBook to its former state, the detailed methods outlined in this guide provide you with the technical steps required to download and install macOS High Sierra successfully.
: Use a compatible Mac to open the macOS High Sierra App Store page. Click "Get" to download the "Install macOS High Sierra.app" to your /Applications folder.
If you have a Mac, it is highly recommended to download the official and convert it yourself to ensure security: How to download and install macOS - Apple Support (IN) 23 Dec 2025 —