A few years ago, Gibson was alpha-testing a new SpinRite disk engine that used available RAM and modern disk controller capabilities to greatly speed up operations. I think it may have also booted with EFI or UEFI instead of requiring a BIOS. Then he got the idea for his SQRL authentication process, so SpinRite was sidelined.Hasn't it been more like decades that he's been promising a vaporware Mac version?
I quit following the progress of SQRL at some point. It now looks like the pages for SQRL at grc.com have not been updated for two years, and there is no mention of the upgraded SpinRite. It is sad to see good (possibly great) ideas wither on the vine this way.