The best free alternative to OpenCore is rEFInd - Boot Manager, which is also Open Source. If that doesn't suit you, our users have ranked five alternatives to OpenCore and five of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to OpenCore are OpenCore Legacy Patcher, Clover EFI bootloader, Plop Boot Manager 6 and rEFIt.
rEFInd is a fork of the rEFIt boot manager for computers based on the Extensible Firmware Interface (EFI) and Unified EFI (UEFI). Like rEFIt, rEFInd is a boot manager, meaning that it presents a menu of options to the user when the computer...
This is EFI-based bootloader for BIOS-based computers created as a replacement to EDK2/Duet bootloader http://www.tianocore.org . To compile it needs to place Clover sources into edk2/ folder.
rEFIt is a boot menu and maintenance toolkit for EFI-based machines like the Intel Macs. You can use it to boot multiple operating systems easily, including triple-boot setups with Boot Camp. It also provides an easy way to enter and explore the EFI pre-boot environment.
Opencore is a program that makes mac os available and is required to install macos on computers. This is just a boot manager
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Opencore is a program that makes mac os available and is required to install macos on computers. This is just a boot manager