You have a custom, hand-built EFI folder, not a universal ISO.

Pre-built ISOs found on third-party sites often include unauthorized modifications or bundled malware. They are notorious for breaking during system updates because they rely on generic, baked-in patches rather than hardware-specific configurations. Essential Components of a Proper Build

relies on the Vanilla method :

for a specific macOS version, or perhaps a guide on how to get started with

"One ISO," he whispered, his eyes bloodshot. "That’s all I need." The Descent into the Forums

, which "trick" an unmodified macOS installer into thinking it's running on a real Mac. The Role of the ISO