No, they did not. It was easily reproducible on an original Mac. I've done it myself, using MacPaint. . . not the Hello, but my own signature and other graphics. Quit making stuff up. MacPaint was demonstrated ON STAGE!
MacPaint was delivered with the Mac introduction in 1984, on January 24th. The graphics for the box artwork and manuals were finished in 1983, because they had to go to the printers and disk reproduction and be ready for the rollout. The original artwork was done on pre-release versions of MacPaint, most pixel-by-pixel, like "hello" and the picture of the japanese woman combing her hair. The software was totally buggy, totally pre-release, and the artist who drew those graphics lost her files over and over in read-write floppy disk crashes and almost went nuts losing her work so many times. In those early days, even getting a screen shot was difficult, because the operating system wasn't finished. What was shown on stage during the product intor was NOT the program used to make those graphics, even though those graphics could be reproduced with them (to a certain degree). A LOT MORE work was done on those graphics than anyone realizes. ALL Mac OS 1.0 coding was done on a Lisa - and then compiled and ported to the Mac, and tested. THERE WAS NO MAC YET. And the programmers resisted any time schedule and had to be bribed with pizza to meet milestones.
There's some real Apple history for you. You're welcome.