<!--
{
  "availability" : [
    "iOS: -",
    "iPadOS: -",
    "macCatalyst: -",
    "macOS: -",
    "tvOS: -",
    "visionOS: -",
    "watchOS: -"
  ],
  "documentType" : "symbol",
  "framework" : "CoreFoundation",
  "identifier" : "/documentation/CoreFoundation/CFRunLoopMode",
  "metadataVersion" : "0.1.0",
  "role" : "Structure",
  "symbol" : {
    "kind" : "Structure",
    "modules" : [
      "Core Foundation"
    ],
    "preciseIdentifier" : "c:@T@CFRunLoopMode"
  },
  "title" : "CFRunLoopMode"
}
-->

# CFRunLoopMode

```
struct CFRunLoopMode
```

## Topics

### Type Properties

[`commonModes`](/documentation/CoreFoundation/CFRunLoopMode/commonModes)

Objects added to a run loop using this value as the mode are monitored by all run loop modes that have been declared as a member of the set of “common” modes with [`CFRunLoopAddCommonMode(_:_:)`](/documentation/CoreFoundation/CFRunLoopAddCommonMode(_:_:)).

[`defaultMode`](/documentation/CoreFoundation/CFRunLoopMode/defaultMode)

Run loop mode that should be used when a thread is in its default, or idle, state, waiting for an event. This mode is used when the run loop is started with [`CFRunLoopRun()`](/documentation/CoreFoundation/CFRunLoopRun()).


---

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)