---
title: Constants
framework: appkit
role: collectionGroup
role_heading: API Collection
path: appkit/constants
---

# Constants

Constants for use with multiple classes.

## Topics

### Constants

- [NSIMAGE_UNAVAILABLE_MACCATALYST](appkit/nsimage_unavailable_maccatalyst.md)
- [NS_USER_ACTIVITY_SUPPORTED](appkit/ns_user_activity_supported.md)

## See Also

### Reference

- [Enumerations](appkit/enumerations.md)
- [Data Types](appkit/data-types.md)
- [Macros](appkit/macros.md)