Google monopoly case. Apple is involved because Google pays Apple to set the default search engine in Safari to Google. Apple received 20 billion from Google in 2022 (1) and Google has floated the idea of loosening of its agreements with Apple to make the US government happy (2).

Apple doesn't want to give up that Google money.

  1. https://www.reuters.com/technology/apple-seeks-defend-googles-billion-dollar-payments-search-case-2024-12-24/

  2. https://www.reuters.com/legal/google-says-it-could-loosen-search-deals-us-antitrust-case-2024-12-21/

It's the search engine kickbacks, I believe:

- "This would leave Apple without the ability to defend its right to reach other arrangements with Google that could benefit millions of users and Apple’s entitlement to compensation for distributing Google search to its users."

Also,

https://www.reuters.com/technology/google-antitrust-ruling-m... ("Google antitrust ruling may pose $20 billion risk for Apple" (2024))

I think its the search monopoly one. Likely due to the fact that it was ruled illegal for Google to pay Apple $20B for default search engine placement.

It's a part of it, for sure. Apple is apprehensive of monopoly findings, because it'll provide more ammo for the future lawsuits regarding its AppStore monopoly.