BIOS goes through the post (power-on self-test.) This happens before noting into the operating system to ensure hardware configurations are valid and working correctly. It runs the bootloader to start up your operating system. BIOS is what loads up when the computer starts for waking up your computer’s hardware components to ensure correctly during boot time. It allows level software to reside in a chip on the computer motherboard. To better understand UEFI you need to know what is BIOS because UEFI has replaced BIOS.
What is UEFI (Unified Extensible Firmware Interface?) Fix EFI Internal Shell on macOS Catalina on VirtualBox.Fix UEFI or EFI Internal Shell on macOS Catalina on VirtualBox.What is UEFI (Unified Extensible Firmware Interface?).
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