February 23, 2025
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BIOS (Basic Input/Output System) is a firmware found on the motherboard of a computer.

  • Provides a configuration interface that allows the user to adjust system settings such as date and time, RAM settings, etc.

UEFI (Unified Extensible Firmware Interface) is a firmware that replaces the BIOS on modern computers.

  • UEFI offers a more modern and user-friendly user interface than BIOS.
  • supports hard drives up to 9.4 zettabytes (9.4 trillion gigabytes), while the BIOS only supports hard drives up to 2.2 terabytes.

Differences between BIOS and UEFI:

  • BIOS uses 16-bit architecture, while UEFI uses 32-bit or 64-bit architecture.
  • BIOS supports older operating systems, while UEFI supports modern operating systems.
  • BIOS is an older firmware used to initialize and configure system hardware, while UEFI is a more modern firmware that offers several improvements over BIOS, such as support for larger hard drives, faster operating system loading, and enhanced security.

commmand in linux:

sudo dmidecode -t bios

command in macos:

system_profiler SPHardwareDataType

Look for the line that says “BIOS” or “UEFI.”

Example in linux:

Example in macos:

This firmware version is specific to UEFI systems.

bios example:

UEFI example:

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