---
title: CMMType
framework: Application Services
role: symbol
role_heading: Instance Property
platforms: [macOS 10.0+]
path: applicationservices/cm2header/1560656-cmmtype
---

# CMMType

The signature of the preferred CMM for color-matching and color-checking sessions for this profile. To avoid conflicts with other CMMs, this signature must be registered with the ICC. For the signature of the default CMM, see [Default CMM Signature](../1560689-default_cmm_signature.md).

## Declaration

```occ
OSType CMMType;
```