OS/2 distribution ArcaOS adds support for booting via UEFI
Let's look at this video:
ArcaOS on UEFI hardware (demonstration)
In May 2019 there was a message:
Arca Noae progress report: ArcaOS on UEFI-only hardware
Arca Noae has posted a new item, 'Arca Noae progress report: ArcaOS on UEFI-only hardware'
Unified Extensible Firmware Interface (UEFI) is gradually replacing the traditional system BIOS. The vast majority of PCs on the market are now based on UEFI technology, and a number of these include what is called a Compatibility Support Module (CSM). This CSM "layer" replaces the traditional BIOS and provides backward-compatibility support for booting operating systems [...]
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We at Arca Noae would like to thank our development partners, bww bitwise works, GmbH and http://Netlabs.org for their continued contributions to the OS/2 platform. Monetary contributions to offset their operating costs may be made either through Arca Noae at https://www.arcanoae.com or bww bitwise works, GmbH at http://www.bitwiseworks.com.
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