# Framework Version Numbers Version numbers of the Core Foundation framework. ## Discussion Compare these values to the value of the [`kCFCoreFoundationVersionNumber`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber) variable to identify on which version of the Core Foundation framework your code is executing. ## Topics ### Constants [`kCFCoreFoundationVersionNumber10_0`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_0) The Core Foundation framework version in macOS 10.0. [`kCFCoreFoundationVersionNumber10_0_3`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_0_3) The Core Foundation framework version in macOS 10.0.3. [`kCFCoreFoundationVersionNumber10_1`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_1) The Core Foundation framework version in macOS 10.1. [`kCFCoreFoundationVersionNumber10_1_1`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_1_1) The Core Foundation framework version in macOS 10.1.1. [`kCFCoreFoundationVersionNumber10_1_2`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_1_2) The Core Foundation framework version in macOS 10.1.2. [`kCFCoreFoundationVersionNumber10_1_3`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_1_3) The Core Foundation framework version in macOS 10.1.3. [`kCFCoreFoundationVersionNumber10_1_4`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_1_4) The Core Foundation framework version in macOS 10.1.4. [`kCFCoreFoundationVersionNumber10_2`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_2) The Core Foundation framework version in macOS 10.2. [`kCFCoreFoundationVersionNumber10_2_1`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_2_1) The Core Foundation framework version in macOS 10.2.1. [`kCFCoreFoundationVersionNumber10_2_2`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_2_2) The Core Foundation framework version in macOS 10.2.2. [`kCFCoreFoundationVersionNumber10_2_3`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_2_3) The Core Foundation framework version in macOS 10.2.3. [`kCFCoreFoundationVersionNumber10_2_4`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_2_4) The Core Foundation framework version in macOS 10.2.4. [`kCFCoreFoundationVersionNumber10_2_5`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_2_5) The Core Foundation framework version in macOS 10.2.5. [`kCFCoreFoundationVersionNumber10_2_6`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_2_6) The Core Foundation framework version in macOS 10.2.6. [`kCFCoreFoundationVersionNumber10_2_7`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_2_7) The Core Foundation framework version in macOS version 10.2.7. [`kCFCoreFoundationVersionNumber10_2_8`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_2_8) The Core Foundation framework version in macOS 10.2.8. [`kCFCoreFoundationVersionNumber10_3`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_3) The Core Foundation framework version in macOS 10.3. [`kCFCoreFoundationVersionNumber10_3_1`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_3_1) The Core Foundation framework version in macOS 10.3.1. [`kCFCoreFoundationVersionNumber10_3_2`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_3_2) The Core Foundation framework version in macOS 10.3.2. [`kCFCoreFoundationVersionNumber10_3_3`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_3_3) The Core Foundation framework version in macOS 10.3.3. [`kCFCoreFoundationVersionNumber10_3_4`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_3_4) The Core Foundation framework version in macOS 10.3.4. [`kCFCoreFoundationVersionNumber10_3_5`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_3_5) The Core Foundation framework version in macOS 10.3.5. [`kCFCoreFoundationVersionNumber10_3_6`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_3_6) The Core Foundation framework version in macOS 10.3.6. [`kCFCoreFoundationVersionNumber10_3_7`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_3_7) The Core Foundation framework version in macOS 10.3.7. [`kCFCoreFoundationVersionNumber10_3_8`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_3_8) The Core Foundation framework version in macOS 10.3.8. [`kCFCoreFoundationVersionNumber10_3_9`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_3_9) The Core Foundation framework version in macOS 10.3.9. [`kCFCoreFoundationVersionNumber10_4`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_4) The Core Foundation framework version in macOS 10.4. [`kCFCoreFoundationVersionNumber10_4_1`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_4_1) The Core Foundation framework version in macOS 10.4.1. [`kCFCoreFoundationVersionNumber10_4_2`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_4_2) The Core Foundation framework version in macOS 10.4.2. [`kCFCoreFoundationVersionNumber10_4_3`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_4_3) The Core Foundation framework version in macOS 10.4.3. [`kCFCoreFoundationVersionNumber10_4_4_Intel`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_4_4_Intel) The Core Foundation framework version in macOS 10.4.4 on Intel-based Mac computers. [`kCFCoreFoundationVersionNumber10_4_4_PowerPC`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_4_4_PowerPC) The Core Foundation framework version in macOS 10.4.4 on PowerPC-based Mac computers. [`kCFCoreFoundationVersionNumber10_4_5_Intel`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_4_5_Intel) The Core Foundation framework version in macOS 10.4.5 on Intel-based Mac computers. [`kCFCoreFoundationVersionNumber10_4_5_PowerPC`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_4_5_PowerPC) The Core Foundation framework version in macOS 10.4.5 on PowerPC-based Macintosh computers. [`kCFCoreFoundationVersionNumber10_4_6_Intel`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_4_6_Intel) The Core Foundation framework version in macOS version 10.4.6 on Intel-based Mac computers. [`kCFCoreFoundationVersionNumber10_4_6_PowerPC`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_4_6_PowerPC) The Core Foundation framework version in macOS 10.4.6 on PowerPC-based Mac computers. [`kCFCoreFoundationVersionNumber10_4_7`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_4_7) The Core Foundation framework version in macOS 10.4.7. [`kCFCoreFoundationVersionNumber10_4_8`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_4_8) The Core Foundation framework version in macOS 10.4.8. [`kCFCoreFoundationVersionNumber10_4_9`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_4_9) The Core Foundation framework version in macOS 10.4.9. [`kCFCoreFoundationVersionNumber10_4_10`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_4_10) The Core Foundation framework version in macOS 10.4.10. [`kCFCoreFoundationVersionNumber10_4_11`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_4_11) The Core Foundation framework version in macOS 10.4.11. [`kCFCoreFoundationVersionNumber10_5`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_5) The Core Foundation framework version in macOS 10.5. [`kCFCoreFoundationVersionNumber10_5_1`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_5_1) The Core Foundation framework version in macOS 10.5.1. [`kCFCoreFoundationVersionNumber10_5_2`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_5_2) The Core Foundation framework version in macOS 10.5.2. [`kCFCoreFoundationVersionNumber10_5_3`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_5_3) The Core Foundation framework version in macOS 10.5.3. [`kCFCoreFoundationVersionNumber10_5_4`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_5_4) The Core Foundation framework version in macOS 10.5.4. [`kCFCoreFoundationVersionNumber10_5_5`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_5_5) The Core Foundation framework version in macOS 10.5.5. [`kCFCoreFoundationVersionNumber10_5_6`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_5_6) The Core Foundation framework version in macOS 10.5.6. [`kCFCoreFoundationVersionNumber10_5_7`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_5_7) The Core Foundation framework version in macOS 10.5.7. [`kCFCoreFoundationVersionNumber10_5_8`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_5_8) The Core Foundation framework version in macOS 10.5.8. [`kCFCoreFoundationVersionNumber10_6`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_6) The Core Foundation framework version in macOS 10.6. [`kCFCoreFoundationVersionNumber10_6_1`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_6_1) The Core Foundation framework version in macOS 10.6.1. [`kCFCoreFoundationVersionNumber10_6_2`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_6_2) The Core Foundation framework version in macOS 10.6.2. [`kCFCoreFoundationVersionNumber10_6_3`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_6_3) The Core Foundation framework version in macOS 10.6.3. [`kCFCoreFoundationVersionNumber10_6_4`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_6_4) The Core Foundation framework version in macOS 10.6.4. [`kCFCoreFoundationVersionNumber10_6_5`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_6_5) The Core Foundation framework version in macOS 10.6.5. [`kCFCoreFoundationVersionNumber10_6_6`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_6_6) The Core Foundation framework version in macOS 10.6.6. [`kCFCoreFoundationVersionNumber10_6_7`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_6_7) The Core Foundation framework version in macOS 10.6.7. [`kCFCoreFoundationVersionNumber10_6_8`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_6_8) The Core Foundation framework version in macOS 10.6.8. [`kCFCoreFoundationVersionNumber10_7`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_7) The Core Foundation framework version in macOS 10.7. [`kCFCoreFoundationVersionNumber10_7_1`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_7_1) The Core Foundation framework version in macOS 10.7.1. [`kCFCoreFoundationVersionNumber10_7_2`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_7_2) The Core Foundation framework version in macOS 10.7.2. [`kCFCoreFoundationVersionNumber10_7_3`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_7_3) The Core Foundation framework version in macOS 10.7.3. [`kCFCoreFoundationVersionNumber10_7_4`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber10_7_4) The Core Foundation framework version in macOS 10.7.4. [`kCFCoreFoundationVersionNumber_iPhoneOS_2_0`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber_iPhoneOS_2_0) The Core Foundation framework version in iOS version 2.0. [`kCFCoreFoundationVersionNumber_iPhoneOS_2_1`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber_iPhoneOS_2_1) The Core Foundation framework version in iOS version 2.1. [`kCFCoreFoundationVersionNumber_iPhoneOS_2_2`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber_iPhoneOS_2_2) The Core Foundation framework version in iOS version 2.2. [`kCFCoreFoundationVersionNumber_iPhoneOS_3_0`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber_iPhoneOS_3_0) The Core Foundation framework version in iOS version 3.0. [`kCFCoreFoundationVersionNumber_iPhoneOS_3_1`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber_iPhoneOS_3_1) The Core Foundation framework version in iOS version 3.1. [`kCFCoreFoundationVersionNumber_iPhoneOS_3_2`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber_iPhoneOS_3_2) The Core Foundation framework version in iOS version 3.2. [`kCFCoreFoundationVersionNumber_iOS_4_0`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber_iOS_4_0) The Core Foundation framework version in iOS version 4.0. [`kCFCoreFoundationVersionNumber_iOS_4_1`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber_iOS_4_1) The Core Foundation framework version in iOS version 4.1. [`kCFCoreFoundationVersionNumber_iOS_4_2`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber_iOS_4_2) The Core Foundation framework version in iOS version 4.2. [`kCFCoreFoundationVersionNumber_iOS_4_3`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber_iOS_4_3) The Core Foundation framework version in iOS version 4.3. [`kCFCoreFoundationVersionNumber_iOS_5_0`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber_iOS_5_0) The Core Foundation framework version in iOS version 5.0. [`kCFCoreFoundationVersionNumber_iOS_5_1`](/documentation/CoreFoundation/kCFCoreFoundationVersionNumber_iOS_5_1) The Core Foundation framework version in iOS version 5.1. --- 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)