To be antifragile you need to always have top talent and have them work on deep projects and produce top notch products.
Apple had that with Steve Jobs.
I don't think it has that now. I haven't seen anything really interesting from Apple after Steve Jobs passed away. Their macbook offerings keep getting worse: the touch bar is a UX disaster. The desktop keeps getting slower. The UI keeps getting flatter and worse.
Apple used to be a market leader: they would release a new product every few years and everyone would soon follow suit: iPhone, iPad.
Now Apple is just trying to mimick other companies: producing various sizes and version of iPhone and iPad.
Having a strong supply chain is not antifragile.