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   -(NSImage*)rotateImage:(CGFloat)degrees
    {
        NSImage *_image = [YourImageController image];
        NSRect imageBounds = {NSZeroPoint, [_image size]};
 
        NSBezierPath *boundsPath = [NSBezierPath bezierPathWithRect:imageBounds];
 
        NSAffineTransform *transform = [NSAffineTransform transform];
 
        [transform rotateByDegrees:degrees];
        [boundsPath transformUsingAffineTransform:transform];
 
        NSRect rotatedBounds = {NSZeroPoint, [boundsPath bounds].size};
 
        NSImage *rotatedImage = [[NSImage alloc] initWithSize:rotatedBounds.size];
           imageBounds.origin.x = NSMidX(rotatedBounds) - (NSWidth (imageBounds) / 2);
        imageBounds.origin.y = NSMidY(rotatedBounds) - (NSHeight (imageBounds) / 2);
transform = [NSAffineTransform transform];
 
    [transform translateXBy:+(NSWidth(rotatedBounds)/ 2) yBy:+(NSHeight(rotatedBounds) / 2)];
 
[transform rotateByDegrees:degrees];
 
    [transform translateXBy:-(NSWidth(rotatedBounds)/ 2) yBy:-(NSHeight(rotatedBounds) / 2)];
[rotatedImage lockFocus];
[transform concat];
 
    [_image drawInRect:imageBounds fromRect:NSZeroRect operation:NSCompositeCopy fraction:1.0] ;
        [rotatedImage unlockFocus];
        return rotatedImage;
    }

   -(NSImage*)rotateImage:(CGFloat)degrees
    {
        NSImage *_image = [YourImageController image];
        NSRect imageBounds = {NSZeroPoint, [_image size]};

        NSBezierPath *boundsPath = [NSBezierPath bezierPathWithRect:imageBounds];

        NSAffineTransform *transform = [NSAffineTransform transform];

        [transform rotateByDegrees:degrees];
        [boundsPath transformUsingAffineTransform:transform];

        NSRect rotatedBounds = {NSZeroPoint, [boundsPath bounds].size};

        NSImage *rotatedImage = [[NSImage alloc] initWithSize:rotatedBounds.size];
           imageBounds.origin.x = NSMidX(rotatedBounds) - (NSWidth (imageBounds) / 2);
        imageBounds.origin.y = NSMidY(rotatedBounds) - (NSHeight (imageBounds) / 2);
transform = [NSAffineTransform transform];

    [transform translateXBy:+(NSWidth(rotatedBounds)/ 2) yBy:+(NSHeight(rotatedBounds) / 2)];

[transform rotateByDegrees:degrees];

    [transform translateXBy:-(NSWidth(rotatedBounds)/ 2) yBy:-(NSHeight(rotatedBounds) / 2)];
[rotatedImage lockFocus];
[transform concat];

    [_image drawInRect:imageBounds fromRect:NSZeroRect operation:NSCompositeCopy fraction:1.0] ;
        [rotatedImage unlockFocus];
        return rotatedImage;
    }