Rigorous network security requirements are set to arrive with iOS 27, and they will be especially significant for developers and IT administrators.

iOS 27 and its corresponding updates are still more than a month away, but we already have a good idea of what to expect. Apple itself, for instance, has confirmed that macOS 27 would eliminate support for Intel Mac.

Now, the company has outlined yet another change in its upcoming software updates, one which will impact device management service developers and IT administrators more than the average user.

A new Apple support document explains that its new OS releases "will require stricter network security for system processes." As a result of these updated security requirements, iOS 27 and the other new releases "might refuse connections to servers with outdated or non-compliant TLS configurations."

Administrators and developers will be required to update their server configurations to ensure they support TLS 1.2 or later, though Apple recommends using TLS 1.3. Additionally, servers will need to use ATS-compliant ciphersuites and present valid certificates that meet ATS standards.

Servers that only support TLS 1.2, meanwhile, also need to support key exchange algorithms that provide Perfect Forward Secrecy (ECDHE), along with AEAD ciphersuites based on AES-GCM with SHA-256, SHA-384, or SHA-512, and the extended master secret extension (RFC 7627).

Apple has also outlined the software actions that its updated security requirements will impact:

  • Mobile device management (MDM)
  • Declarative Device Management (DDM)
  • Automated Device Enrollment
  • Configuration profile installation
  • App installation, including enterprise app distribution
  • Software updates

Developers and IT administrators have also been provided with debugging instructions. To test compliance with Apple's new security standards, developers will need to install Apple's Network Diagnostics Logging Profile on a test device running iOS 26.4 or later, or a corresponding software release for other Apple platforms.

Once the profile has been installed, developers are instructed to run their typical workflow, after which diagnostics logs need to be collected and interpreted.

The updated OS 27 security requirements are changes that really only affect developers. More casual iPhone and iPad users, meanwhile, will be able to enjoy an updated Siri, along with performance and stability improvements.

Apple's next major software releases will debut at WWDC 2026, which will begin with a keynote video on June 8.