Apps similar to OpenCore Legacy Patcher include macOStoUSB, which is free. Other options are rEFInd - Boot Manager, OpenCore, Clover EFI bootloader and Mist. In total there are seven Boot Managers like OpenCore Legacy Patcher for Mac, Windows and Linux.
Utility for step-by-step creation of bootable macOS USB installers using official sources. Features compatibility checks, support for multiple Mac types, download resume, installer cache, signature verification, history, logs, and multilingual interface.
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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...
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OpenCore is an open-sourced tool designed to prepare a system for macOS booting and has been architected to alleviate many of the constraints imposed by its alternatives like Clover(these tools are sometimes referred to as "boot loaders").
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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.
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