Macworld Parenthood brings many challenges, but the worst for my money is when your child refuses to eat some delicious food they’ve never tasted. Just try it, you beg, tears running down your face. Everyone likes halloumi. Not that adults are much better. We’re slightly more likely to give unfamiliar food a chance, I suppose, but unfamiliar people and places and political viewpoints? Good luck with that. Unfamiliar technology, too. iPhone users: when was the last time you gave Android a proper try? All of this came to mind last week when I finally got a chance to try out Vision Pro, Apple’s m…