I have no idea what Nokia did, but the Mac OS X statement is extremely wrong. OS X is a descendant of NeXTSTEP/OPENSTEP which always ran on IA-32. From 1989. Rhapsody (the unreleased OS X precursor which added a more Mac OS interface to OPENSTEP) ran on IA-32. Even Mac OS X Server 1.0 ran on IA-32. Mac OS X 10.0-10.3 were not released for IA-32, but support was maintained internally by Apple, fact easily checked because the Darwin releases from that period worked on IA-32.