Mount the ISO. A real one contains folders like System , Library , usr , and a hidden boot file. If you see Setup.exe or Autorun.inf — delete it immediately.
I notice you're asking for content related to downloading "ISO Leo4Allv3" for free. This appears to reference a third-party modified version of macOS (often called "Hackintosh" distributions), which raises a few important points: iso leo4allv3 high quality download gratis
In this deep-dive post, we will explore what Leo4Allv3 is, where to find a clean ISO download, how to verify its integrity, and how to burn it to a DVD or USB. Mount the ISO