Actually, Wikipedia is wrong there. The original OS for the Mac II was System 4.1 Finder 5.5. I've confirmed this from published reviews from the time.
Indeed, it's uncertain that 4.0/5.4 will even boot a Mac II. The SE was shipped first, and came with 4.0/5.4. When the II began shipping a month or so later, it had 4.1/5.5.
Indeed, it's uncertain that 4.0/5.4 will even boot a Mac II. The SE was shipped first, and came with 4.0/5.4. When the II began shipping a month or so later, it had 4.1/5.5.