---
title: MTLStorageMode.shared
framework: metal
role: symbol
role_heading: Case
path: metal/mtlstoragemode/shared
---

# MTLStorageMode.shared

The CPU and GPU share access to the resource, allocated in system memory.

## Declaration

```swift
case shared
```

## Mentioned in

Choosing a resource storage mode for Apple GPUs Optimizing texture data Setting resource storage modes Adjusting for GPU memory bandwidth tradeoffs Choosing a resource storage mode for Intel and AMD GPUs Converting a GPU’s counter data into a readable format Creating a counter sample buffer to store a GPU’s counter data during a pass Improving CPU performance by using argument buffers Synchronizing a managed resource in macOS

## Discussion

Discussion This is the default storage mode for MTLBuffer instances on integrated GPUs and both MTLBuffer and MTLTexture instances on Apple silicon GPUs. On non-Apple family GPUs, the shared storage mode isn’t available for MTLTexture instances. When either the CPU or GPU changes the contents of the resource, you’re responsible for synchronizing access to the texture from the other participant. Ensure that all changes you schedule on either the CPU or GPU for a resource that uses shared memory complete before accessing that resource on the other processor. For more guidance on how to choose storage modes, see Setting resource storage modes.

## See Also

### Storage mode options

- [MTLStorageMode.managed](metal/mtlstoragemode/managed.md)
- [MTLStorageMode.private](metal/mtlstoragemode/private.md)
- [MTLStorageMode.memoryless](metal/mtlstoragemode/memoryless.md)