: A more technical command-line-based tool that was among the first to support Big Sur on unsupported hardware. Compatibility & Hardware Requirements

: Macs with Metal-compatible GPUs (generally 2012 and later) perform much better.

: A Python-based project that uses the OpenCore bootloader to "trick" the Mac into thinking it is a supported model. It supports hardware as old as 2007 and allows for native over-the-air (OTA) updates. Patched Sur

The most recommended and reliable way to install macOS Big Sur on unsupported Macs is using the OpenCore Legacy Patcher (OCLP) . This tool allows Macs from roughly 2008 to 2013

While several options were developed during the Big Sur lifecycle, OpenCore Legacy Patcher (OCLP)