How do Apple get ISO9001?

You will not find that information here in this user to user tech forum. It’s a good question. This will sound old fashioned but you may want to see the research librarian at your local library. Or, if you are a college student, the research librarian at your university library will be able to offer guidance on how to research this. Most libraries have access to better (paid) research sites than a Google search will find. Good luck!

If you go to your college library and the research librarian cannot help, you may have to pick another company. I don’t know who you could contact at Apple who would be willing to discuss this. I’m just another Apple user like you. This is a user to user forum where volunteers try to help with technical questions. Have you tried searching for “Apple,ISO 9001”?