Ensure you have "Enable EFI" checked. High Sierra will not boot via Legacy BIOS in VirtualBox. Also, in Storage settings, set the ISO to "Optical Drive" not "Floppy".
An updated graphics API that improved game performance and machine learning capabilities, allowing developers to access the GPU more directly. Macos High Sierra 10.13.6.iso
Official support ended on November 12, 2020 , meaning it no longer receives security updates and is considered obsolete for modern internet use. Ensure you have "Enable EFI" checked
hdiutil detach /Volumes/Install\ macOS\ High\ Sierra An updated graphics API that improved game performance
While official Apple support ended in late 2020, High Sierra 10.13.6 remains a popular choice for users of "vintage" Macs. It is the last version to support many 32-bit applications, making it essential for users who rely on older software that was never updated for 64-bit-only systems like Catalina or Big Sur.