iMac 2006 does not boot independently

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6

There’s:
https://discuss.haiku-os.org/t/uefi-guide/8457

and
https://www.haiku-os.org/guides/uefi_booting/

Unrelated to booting Haiku, there’s this article if you’re curious about the whole process:
https://depletionmode.com/uefi-boot.html