Because Apple doesn't provide an ISO, the community creates them by converting the official Install macOS High Sierra.app into an ISO. Therefore, when you search for "macOS High Sierra 10.13.6 ISO download," you are looking for a community-converted ISO or a guide to create your own.
Developers and testers often need to run macOS inside VirtualBox or VMware Workstation on a Windows or Linux host. These hypervisors natively prefer .iso files for installation media.
| Issue | Likely Cause | Solution |
| :--- | :--- | :--- |
| ISO won't boot in VirtualBox | Missing EFI firmware or incorrect VM settings | Enable "EFI" (not BIOS) in VM settings, disable Floppy drive. |
| "This copy of the Install macOS High Sierra application is damaged" | Invalid certificate expiry (Apple’s old certificate expired in 2019) | Open Terminal in recovery mode and run: date 0101010119 to set date back temporarily. |
| ISO size is 800MB instead of 5.2GB | You downloaded the "InstallAssistant.pkg" or a stub installer, not the full app. | Redownload using the softwareupdate --fetch-full-installer command. |
| VirtualBox shows a black screen after boot | Graphics controller incompatibility | Change Graphics Controller to "VBoxSVGA" or "VMSVGA". | macos high sierra 10.13 6 iso download
Apple officially provides macOS High Sierra for free through the App Store, but only as an .app installer, not as an ISO. You can:
Create your own ISO from the official installer (legitimate method): Because Apple doesn't provide an ISO, the community
mv ~/Desktop/HighSierra.iso.cdr ~/Desktop/HighSierra.iso
This yields a 100% legal, malware-free ISO ready for VMs or old hardware. Create your own ISO from the official installer
| Reason | Explanation | |--------|-------------| | Virtual machines | ISO is easier to boot in VMware, VirtualBox, or Parallels than the .app installer. | | USB bootable drives | Some tutorials incorrectly claim ISO is required for bootable USB creation. | | Older Mac revival | Owners of unsupported Macs (e.g., 2008 Mac Pro) try patched ISOs like DosDude1’s patcher. | | No access to App Store | macOS High Sierra is removed from the Purchased tab if you never downloaded it before. |
If you need it for a legitimate Mac or VM: