The European Union says it will outline steps to compel Apple to open up its iPhone and iPad operating systems to competing technologies under the bloc’s tough new digital rulebook, which threatens hefty fines for breaches.

Key Takeaways The European Union's enforcement arm said Thursday it's initiating a pair of "specification proceedings" into whether Apple is complying with its "interoperability obligations" under the Digital Markets Act.

The EU says Apple must make iOS more open to third-party accessories makers. The European Union wants Apple to continue complying with the Digital Markets Act. With the first proc