The European Union has launched enforcement actions against tech giants Google and Apple under its Digital Markets Act, defying potential US retaliation. The EU accuses Google of unfairly favoring its own services in search results and restricting app store competition, while Apple faces orders to improve device compatibility with rival products. The decisions could result in fines up to 10% of global turnover, escalating to 20% for repeat violations. Both companies strongly contested the rulings, with Apple arguing the changes would compromise user security and Google claiming the decision would harm European businesses and consumers.