I don't think anyone answered sufficiently, the main thing was yeah Steve Jobs was on their board of directors and was the CEO of Pixar, but that runs deep even though Jobs died 12 years ago.
There was some analysis/chatter also that basically Disney's entire strategy the last 5-8 years also was to pump up its valuation as large as possible and then get acquired by Apple.
Idk man, none of us had a drink at a bar with "Apple" and "Disney" to confirm the cozy relationship, others have provided business partnerships, what would satisfy you?
I’m not the one out there trying to personify a friendship into two giant corporations. It’s a popular perception, but I just don’t see a lot of convincing evidence.