I’ve upgraded XCode 4.5 today and built my project. A compile-error shows: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk/System/Library/Frameworks/AVFoundation.framework/Headers/AVAudioMix.h:15:9: ‘MediaToolbox/MTAudioProcessingTap.h’

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Asked: June 11, 20262026-06-11T17:56:49+00:00 2026-06-11T17:56:49+00:00

I’ve upgraded XCode 4.5 today and built my project. A compile-error shows: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk/System/Library/Frameworks/AVFoundation.framework/Headers/AVAudioMix.h:15:9: ‘MediaToolbox/MTAudioProcessingTap.h’

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I’ve upgraded XCode 4.5 today and built my project.
A compile-error shows:

/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk/System/Library/Frameworks/AVFoundation.framework/Headers/AVAudioMix.h:15:9:
'MediaToolbox/MTAudioProcessingTap.h' file not found

The error occurs even I add MediaToolbox in my Project Settings-> Build Phase.

The strange truth is I create a new project and just import the AVFoundation.framework.
It works.

Here’s my environment:

Mac OS X version: 10.7.4 
Xcode Version: 4.5 (4G182) 
gcc version 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00)
GNU gdb 6.3.50-20050815 (Apple version gdb-1822) (Sun Aug  5 03:00:42 UTC 2012)

I’ve tried
XCode 4.5 giving me "SenTestingKit/SenTestKit.h" file not found, but works on 4.4.1
but it didn’t work.