Download the full installer for macOS Big Sur directly on a compatible Mac.
The is the least reliable and most dangerous. macos big sur iso 2021
You now have a legitimate, safe ISO file on your desktop suitable for virtual machines. Download the full installer for macOS Big Sur
In 2021, Apple Silicon M1 Macs were exploding in popularity, but Intel-based virtualization was still king for developers testing legacy x86 software. In 2021, Apple Silicon M1 Macs were exploding
: Ensure you have at least 20GB of free space for the download and roughly 15GB for the final installation. Creating the ISO from the Installer
Once you have Big Sur running (via any method):
| Method | Difficulty | Performance | Legality | |--------|------------|-------------|----------| | Official .app → VM (macOS host) | Easy | Native | ✅ Legal | | InstallMacOSBigSur.dmg → VMware (Windows) via unlocker | Medium | Fair | ⚠️ Gray area (Apple EULA forbids non‑Apple hardware) | | Hackintosh (OpenCore) with Big Sur | Hard | Excellent | ❌ EULA violation | | Cloud macOS (MacStadium, Scaleway) | Easy | Great | ✅ Legal (but paid) |