Can you provide me with a download link to your version please?
if so, then it would say 6.2a when you go to preferences->iaslThat is exactly where I downloaded it from. I downloaded the newest iasl.zip (the one with 111k downloads)
you probably have the correct iasl in /usr/bin but using old version of macIASL, link to latest version:Under preferences in MaciASL I cannot select iasl 6.2a, only 4.0, 5.0A or 5.1. But I copied the iasl file from my downloads folder to /usr/bin/ like RehabMans guide said. I have copied the origin folder from the EFI partition to my Desktop and then used the command from rehabmans guide (the one you wrote earlier)