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# MTLMutability

The options that determine the mutability of a buffer’s contents.

```
enum MTLMutability
```

## Topics

### Enumeration cases

[`MTLMutability.default`](/documentation/Metal/MTLMutability/default)

The default behavior, based on the buffer’s type.

[`MTLMutability.mutable`](/documentation/Metal/MTLMutability/mutable)

An option that states that you can modify the buffer’s contents.

[`MTLMutability.immutable`](/documentation/Metal/MTLMutability/immutable)

An option that states that you can’t modify the buffer’s contents.


---

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