I am trying to use Mizage’s window flipper library in my Mac app. When

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Editorial Team

Asked: May 26, 20262026-05-26T14:53:20+00:00 2026-05-26T14:53:20+00:00

I am trying to use Mizage’s window flipper library in my Mac app. When

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I am trying to use Mizage’s window flipper library in my Mac app.

When I tried to build it, the following error occurs:

Undefined symbols for architecture x86_64:
"_kCAGravityCenter", referenced from:
  -[NSWindow(Flipper) flipWithArguments:] in NSWindowFlipper.o
"_CATransform3DMakeRotation", referenced from:
  -[NSWindow(Flipper) flipWithArguments:] in NSWindowFlipper.o
"_kCAMediaTimingFunctionEaseInEaseOut", referenced from:
  -[NSWindow(Flipper) flipWithArguments:] in NSWindowFlipper.o
"_CATransform3DIdentity", referenced from:
  -[NSWindow(Flipper) flipWithArguments:] in NSWindowFlipper.o
"_CATransform3DRotate", referenced from:
  -[NSWindow(Flipper) flipWithArguments:] in NSWindowFlipper.o
"_OBJC_CLASS_$_CALayer", referenced from:
  objc-class-ref in NSWindowFlipper.o
"_OBJC_CLASS_$_CABasicAnimation", referenced from:
  objc-class-ref in NSWindowFlipper.o
"_OBJC_CLASS_$_CAMediaTimingFunction", referenced from:
  objc-class-ref in NSWindowFlipper.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

My base SDK is 10.7 and have ARC enabled. I am new to Cocoa and have not seen this kind of error before. Can someone suggest what’s the problem here and possibly how to resolve it? Thanks.