---
title: OSBundleUsageDescription
framework: bundleresources
role: symbol
role_heading: Property List Key
path: bundleresources/information-property-list/osbundleusagedescription
---

# OSBundleUsageDescription

A message that tells people why the app is trying to install a driver extension bundle.

## Discussion

Discussion This key is required for all DriverKit extensions. Failure to include this key results in an error at activation time. For system extensions that are not DriverKit extensions, use NSSystemExtensionUsageDescription instead.

## See Also

### System Extensions

- [NSSystemExtensionUsageDescription](bundleresources/information-property-list/nssystemextensionusagedescription.md)