In the OpenCore Patcher app, click again, then select Flash Installer . Select the macOS Big Sur installer you just downloaded.
Your Mac will restart several times during this process. The boot sequence must route through the USB drive's EFI bootloader until the installation finishes. Post-Installation Requirements
Once Big Sur boots up successfully and you complete the initial setup wizard, you must make the patch permanent so you can boot without the USB drive.
A patcher is a community-developed tool that modifies the macOS installer or the boot environment, allowing modern software to run on hardware Apple has deemed "unsupported". Top Recommended Patchers
Step-by-Step Guide: How to Use OpenCore Legacy Patcher for a Full Setup macos big sur patcher full
It is highly recommended to leave FileVault disk encryption turned off on patched systems, as it can interfere with the OpenCore boot process. Conclusion
Enter your admin password and wait for the process to finish. Step 5: Build and Install OpenCore to the USB Return to the main menu of the OpenCore Patcher app. Click . Once the build finishes, click Install to disk .
You forgot the "Post-Install Root Patch" (see Step 4). Wi-Fi Not Working: Run "Post-Install Root Patch" again. Conclusion
Navigate to the official GitHub repository for . In the OpenCore Patcher app, click again, then
Last updated: 2025. Always check GitHub for the latest patcher versions.
: A user-friendly UI-based patcher designed specifically for 2012 and 2013 Macs. It simplifies the process into a step-by-step guide but has officially ended further development as users migrate to OCLP.
Even with a perfect patcher, issues can arise due to the nature of running unsupported software.
Receive critical security updates denied to Catalina. The boot sequence must route through the USB
Patched Sur was a popular, user-friendly GUI wrapper designed specifically for Big Sur.
Your Mac will immediately reboot. Hold nothing; let it boot to the next screen, where you will now see a choice to boot into the app. Select it. Step 7: Install macOS Big Sur
If the app detects that your hardware requires legacy kexts, click .