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The primary value of ArcaOS is its unique position in the market: it provides the stability of a POSIX-compliant, monolithic kernel that is exceptionally reliable for critical, specialized tasks.

For UEFI BIOS systems when not using a CSM, you can boot the installation medium and press at the first menu to access advanced options. The installer will detect the UEFI environment and configure the boot loader accordingly. Arcaos 5.1 Download