こんなエラーです
$ carthage update --platform ios *** Fetching GPUImage *** Checking out GPUImage at "0.1.7" *** xcodebuild output can be found in /var/folders/62/nrp34pc96t550_hhml86hmwrr_q2rc/T/carthage-xcodebuild.MYLmCm.log *** Building scheme "GPUImageFramework" in GPUImage.xcodeproj Failed to write to /Users/snakagam/Desktop/MyLibrary/Carthage/Build/iOS/GPUImage.framework: Error Domain=NSCocoaErrorDomain Code=260 "The file “GPUImage.framework” couldn’t be opened because there is no such file." UserInfo={NSURL=file:///Users/snakagam/Desktop/MyLibrary/Carthage/Checkouts/GPUImage/build/ArchiveIntermediates/GPUImageFramework/BuildProductsPath/Release-iphoneos/GPUImage.framework, NSFilePath=/Users/snakagam/Desktop/MyLibrary/Carthage/Checkouts/GPUImage/build/ArchiveIntermediates/GPUImageFramework/BuildProductsPath/Release-iphoneos/GPUImage.framework, NSUnderlyingError=0x7f870a806a90 {Error Domain=NSPOSIXErrorDomain Code=2 "No such file or directory"}}