Apple’s macOS 27 removes support for the Apple Filing Protocol (AFP), so the original network-based Time Machine configuration used by AirPort Time Capsule is no longer compatible. Time Machine itself is not going away: directly connected storage and supported SMB network destinations remain available.
The change matters now for anyone still relying on Apple’s discontinued network backup hardware. The practical choice is to migrate to a directly connected drive, a NAS with explicit Time Machine-over-SMB support, or another Mac that meets Apple’s version requirements.
What changes with macOS 27
AFP is Apple’s legacy network file-sharing protocol. AirPort Time Capsule’s original Time Machine setup depends on it, and macOS 27 removes compatibility with that path. The same issue applies to AirPort Extreme configurations that share an external USB drive for backups through AFP.
This is a protocol change, not the removal of Time Machine. A backup disk connected to a Mac over USB or Thunderbolt is unaffected, and network backups can continue when the destination supports the newer Server Message Block (SMB) protocol.
Apple’s warning about the upcoming incompatibility was reported in June 2025. On September 16, 2026, the change is an immediate migration issue for people still using the older AirPort hardware.
What still works with Time Machine
The supported destinations are straightforward:
| Backup destination | Connection or protocol | macOS 27 status | Key condition |
| AirPort Time Capsule | AFP-based network connection | Original configuration is incompatible | The legacy AFP path is affected |
| Direct external drive | USB or Thunderbolt | Supported | The drive connects directly to the Mac |
| Third-party NAS | SMB for Time Machine | Supported | The NAS must explicitly support Time Machine over SMB |
| Another Mac | Network destination | Supported | Apple recommends macOS 11 or later on both Macs |
A NAS is therefore the closest wireless replacement for Time Capsule, but the protocol detail matters. A device that supports AFP alone is not a suitable macOS 27 destination. Look specifically for Time Machine support over SMB in the NAS documentation.
Practical replacements for AirPort Time Capsule
For the least complicated migration, use an external drive connected directly to the Mac. It avoids the network protocol boundary entirely and is the most common Time Machine arrangement documented by Apple.
If wireless backups are important, choose a NAS that explicitly supports Time Machine over SMB. That preserves the network-based workflow, although setup depends on the NAS and its software.
A third option is another Mac. Apple recommends using this arrangement when both computers run macOS 11 or later; the other Mac can share a folder or an attached external disk as the backup destination.
The virtualization workaround is possible, but demanding
A technical demonstration shows macOS Sequoia (macOS 15) running inside UTM/QEMU to preserve an AFP connection to legacy Time Capsule hardware. That approach keeps the older protocol environment separate from the host system, but it is an unofficial workaround rather than restored native compatibility in macOS 27.
It also requires setting up and maintaining a virtual machine, making it a specialist option rather than the sensible migration path for most Mac users.
What to do before moving to macOS 27
- Choose a supported destination: a directly connected USB or Thunderbolt drive, an SMB-compatible NAS, or another Mac running macOS 11 or later alongside the source Mac.
- Set up the new Time Machine destination and allow a backup to complete before depending on it for routine protection.
- Check important historical files stored through the old Time Capsule workflow before treating the migration as finished.
The key distinction is simple: macOS 27 ends the AFP route used by the original AirPort Time Capsule setup, while Time Machine continues through supported local and SMB-based destinations.
