Hello @MaLd0n, can you help me ? I just installed big sur by installing it directly from the application, but when choosing the macOS Installer partition, there is the following message.
Thank you
Model: Thinkpad T460 (20FN003LGE)
Bios: 1.43
CPU: Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz
GPU: Intel HD Graphics 520
Storage: 256GB SSD - Samsung
RAM: 16 GB PC3L-12800 1600MHz DDR3L
Screen: 14" FHD (1920x1080) IPS
Wi-Fi: Intel 8260 -> i using TP-LINK AC600 Mini
Ethernet: Intel I219-V PCIe Gigabit Ethernet
Sound: Realtek ALC3245 (same as ALC239)
Camera: 720p
Battery: 3-cell (23Wh) + 3-cell (23Wh)
LENOVO-EFI.zip