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# NSAppleEvent Timeouts

The following constants should not be used and may eventually be removed.

## Topics

### Constants

[`let NSAppleEventTimeOutDefault: Double`](/documentation/Foundation/NSAppleEventTimeOutDefault)

Specifies that an event-processing operation should continue until a timeout occurs based on a value determined by the Apple Event Manager (about 1 minute). Not currently used by applications.

[`let NSAppleEventTimeOutNone: Double`](/documentation/Foundation/NSAppleEventTimeOutNone)

Specifies that the application is willing to wait indefinitely for the current operation to complete. Not currently used by applications.


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