[matt4077]

I believe they were looking only at plants native to California, and from a quick search it appears at White Sapote's and Guava's closest native populations are in eastern Mexico. I don't necessarily agree with being this strict in the requirements, but I think it's within the realm of being legitimate–although I'm not sure how "native" Apple, Pears etc. are to California.

I've also read that to some degree they were recreating a specific landscape that Steve Jobs grew fond of when growing up. That doesn't really help anybody alive today, but if I were involved in the decisions, I wouldn't interfere with his wishes unless unavoidable.

[sapote]

None of the fruit trees they are planting are native to California.

If they wanted to plant native edibles they'd be stuck with a pretty limited selection of berries and nuts.

Edited to add: White Sapote and Avocado are about as close to native fruit trees as you can get in California. Apples, on the other hand, are native to Kazakhstan.