<!--
{
  "availability" : [
    "macOS: 15.4.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "FSKit",
  "identifier" : "/documentation/FSKit/FSUnaryFileSystemOperations/didFinishLoading()",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Method",
  "symbol" : {
    "kind" : "Instance Method",
    "modules" : [
      "FSKit"
    ],
    "preciseIdentifier" : "c:objc(pl)FSUnaryFileSystemOperations(im)didFinishLoading"
  },
  "title" : "didFinishLoading()"
}
-->

# didFinishLoading()

Notifies you that the system finished loading your file system extension.

```
optional func didFinishLoading()
```

## Discussion

The system performs this callback after the main run loop starts and before receiving the first message from the FSKit daemon.

Implement this method if you want to perform any setup prior to receiving FSKit callbacks.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)