# VZVirtioTraditionalMemoryBalloonDeviceConfiguration A configuration object that provides a way to reclaim memory from the guest system. ``` class VZVirtioTraditionalMemoryBalloonDeviceConfiguration ``` ## Overview Create a `VZVirtioTraditionalMemoryBalloonDeviceConfiguration` object when you want the ability to reclaim memory from the guest operating system. After creating this object, add it to the [`memoryBalloonDevices`](/documentation/Virtualization/VZVirtualMachineConfiguration/memoryBalloonDevices) property of your [`VZVirtualMachineConfiguration`](/documentation/Virtualization/VZVirtualMachineConfiguration) object. In response, the virtual machine provides a [`VZVirtioTraditionalMemoryBalloonDevice`](/documentation/Virtualization/VZVirtioTraditionalMemoryBalloonDevice) object, which you use to initiate memory-related requests with the guest system. Access that object from the [`memoryBalloonDevices`](/documentation/Virtualization/VZVirtualMachine/memoryBalloonDevices) property of [`VZVirtualMachine`](/documentation/Virtualization/VZVirtualMachine). > Important: > Create only one `VZVirtioTraditionalMemoryBalloonDeviceConfiguration` object for your virtual machine. ## Topics ### Creating the Configuration Object [`init()`](/documentation/Virtualization/VZVirtioTraditionalMemoryBalloonDeviceConfiguration/init()) Creates a memory ballon device configuration object to include with your virtual machine’s configuration data. --- Copyright © 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)