---
title: systemImmutable
framework: system
role: symbol
role_heading: Type Property
path: system/fileflags/systemimmutable
---

# systemImmutable

File may not be changed.

## Declaration

```swift
static var systemImmutable: FileFlags { get }
```

## Discussion

Discussion The corresponding C constant is SF_IMMUTABLE. note: This flag may only be changed by the superuser.