Free Software Foundation Europe Steps Into Apple’s DMA Interoperability Battle
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A New Front in the DMA War
The legal battle between Apple and the European Commission over the Digital Markets Act (DMA) has gained a new influential voice. The Court of Justice of the European Union (CJEU) has officially granted the Free Software Foundation Europe (FSFE) permission to intervene in case T-359/25, a specific legal challenge launched by Apple against the Commission’s mandates on hardware and software interoperability.
This intervention marks a critical pivot in how the DMA is being litigated. While much of the public discourse around the DMA has focused on app store fees and sideloading, this particular case drills down into the technical plumbing of the iOS and iPadOS ecosystems. Specifically, it concerns Article 6(7) of the DMA, which requires “gatekeepers” to allow third-party developers access to the same hardware and software features that Apple uses for its own integrated services.
The Technical Friction of ‘Interoperability’
At the heart of the dispute is a decision by the European Commission that outlines exactly how Apple must facilitate this access. The Commission is pushing for greater transparency, clearer communication channels for developers, and a more open flow of technical information. For Apple, these requirements are often framed as security risks or infringements on intellectual property. For the FSFE, they are the only way to prevent a permanent “walled garden” from stifling innovation.
The CJEU’s decision to let the FSFE intervene is a tacit acknowledgment of the stakes involved. In its order, the court explicitly noted that the outcome of this case is likely to have a “significant impact” on the supply and viability of Free and Open Source Software (FOSS). If Apple is permitted to maintain restrictive or opaque interoperability standards, the court recognized that open-source developers might be effectively locked out of the ecosystem, unable to connect their applications to the core functions of the operating system.
Civil Society vs. Corporate Interests
The FSFE’s presence in the courtroom is intended to provide a counterweight to the corporate interests already involved in the case. While other interveners may be competitors seeking a market advantage, the FSFE argues that its role is to protect the broader philosophy of software freedom and the rights of the end-user.
“With industry interests well represented by several interveners on the other side, FSFE is there to ensure that civil society is equally heard,” the organization stated, emphasizing that the court needs a complete picture of the ecosystem before rendering a judgment.
A Pattern of Legal Challenges
This isn’t the first time the FSFE has stepped into the fray regarding Apple’s relationship with the EU. This is their second intervention in a DMA-related case. They previously entered case T-1080/23, which dealt with the more foundational challenge of Apple’s designation as a “gatekeeper” and its overall obligations under the act.
However, case T-359/25 is more surgical. Rather than arguing about whether Apple is a gatekeeper, it argues about the legality of the implementation. The FSFE is now preparing its formal statement to the court, where it will detail the practical hurdles that open-source developers face when trying to operate within Apple’s proprietary framework.
The result of this case could set a precedent for how all gatekeepers—including Google and Meta—approach interoperability in the future. If the court backs the Commission’s rigorous standards for transparency and access, it could trigger a slow but steady erosion of the proprietary control that has defined the mobile era for nearly two decades.
