Boot from the USB (holding Option/Alt at startup), select the purple EFI Boot icon first, then restart and select the macOS installer.
Download the Patched-Sur.dmg file from the v1.1.0 release page. patched sur v1.1.0 download
is the final major update for the Patched Sur utility, a graphical interface designed to help users install macOS Big Sur on unsupported Mac hardware. While modern macOS versions have moved on, this specific release remains a critical tool for extending the life of vintage Apple machines. Key Features and Improvements in v1.1.0 Boot from the USB (holding Option/Alt at startup),
Most iMacs, Mac minis, MacBook Airs, and MacBook Pros from the 2012–2013 era. patched sur v1.1.0 download