Like I said, I'm not a lawyer, but: yes, I would claim that Apple has a trademark on the word "hello", entirely in lowercase cursive, in that very particular cursive typeface, with a animation that shows it being written out at precisely that speed and in precisely that manner, as a means of promoting a distinctive graphical computer operating system, in a manner that they've continued to reference for the past 40 years [0], yes.
Not a lawyer though.
[0] https://www.youtube.com/watch?v=SGrxGQUPqxk