<!--
{
  "availability" : [
    "iOS: 14.0.0 -",
    "iPadOS: 14.0.0 -",
    "macCatalyst: 14.2.0 - 27.0.0",
    "macOS: 11.0.0 - 27.0.0",
    "tvOS: 14.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "MLCompute",
  "identifier" : "/documentation/MLCompute/MLCRMSPropOptimizer/init(descriptor:)",
  "metadataVersion" : "0.1.0",
  "role" : "Initializer",
  "symbol" : {
    "kind" : "Initializer",
    "modules" : [
      "ML Compute"
    ],
    "preciseIdentifier" : "c:objc(cs)MLCRMSPropOptimizer(cm)optimizerWithDescriptor:"
  },
  "title" : "init(descriptor:)"
}
-->

# init(descriptor:)

Creates an RMSProp optimizer with the descriptor you specify.

```
convenience init(descriptor optimizerDescriptor: MLCOptimizerDescriptor)
```

## Parameters

`optimizerDescriptor`

An object you use to configure the optimizer.

## Return Value

An RMSProp optimizer.

## Discussion

Sets [`momentumScale`](/documentation/MLCompute/MLCSGDOptimizer/momentumScale) to `0.0`, [`alpha`](/documentation/MLCompute/MLCRMSPropOptimizer/alpha) to `0.99`, [`epsilon`](/documentation/MLCompute/MLCRMSPropOptimizer/epsilon) to `1e-8` , and [`isCentered`](/documentation/MLCompute/MLCRMSPropOptimizer/isCentered) to `false` by default.

---

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)