Little known fact…

It is believed that Apple paid the Beatles a little over $500 million for Apple Corp trademark rights so they could market “Apple Music”

https://en.m.wikipedia.org/wiki/Apple_Corps_v_Apple_Computer

Superb rent seeking and squatting by Apple Corps

Aside from the famous case of Apple Corps as noted by jollofricepeas, there are multiple other trademarks for “Apple” as a single word in the US, including for tobacco, horseshoes, books, and travel.