macOS 27 Golden Gate removes AFP support, ending Time Machine compatibility with all Time Capsule models that rely on AFP and SMBv1 protocols, which do not meet the new SMBv2/SMBv3 and TLS 1.2 network security requirements. A community project called TimeCapsuleSMB offers a workaround by installing modern Samba software on supported Time Capsule hardware, though this requires manual activation on older models and starts a new backup chain. Intel Mac users can continue using Time Capsule by staying on macOS 26, but Apple silicon Macs upgrading to macOS 27 will need alternative backup solutions.
https://www.macrumors.com/2026/06/17/macos-27-golden-gate-kills-time-capsule-support/