| Risk | Description | |-------|-------------| | | Bundled ransomware, keyloggers, or cryptominers | | Modified System Files | Disabled SIP, hidden backdoors, pre-installed rootkits | | Expired or Tampered Certificates | Installer may fail or bypass security checks | | Legal gray area | macOS licensing prohibits installation on non-Apple hardware (controversial but enforceable) |
| Need | Recommended Action | |------|--------------------| | | Download .app from Mac App Store | | Bootable USB | Use createinstallmedia (official) | | VMware/VirtualBox on Mac | Use official .app → built-in conversion | | VMware on Windows/Linux | Follow a trusted script (e.g., macrecovery.py from OpenCore) or build ISO via a Mac VM | | Recovery only | Use Internet Recovery (Option+Command+R) | big sur iso
Using a Big Sur ISO offers several benefits: | Risk | Description | |-------|-------------| | |
| Format | Primary OS | Typical Use | Apple Official Support | |--------|------------|-------------|------------------------| | .app | macOS | Installer application bundle | Yes | | .dmg | macOS | Disk image for apps/installers | Yes (for legacy/combo updates) | | .iso | Windows/Linux | Optical disc emulation, virtualization | No (for macOS client installers) | | .pkg | macOS | Package installer | Yes | big sur iso