@implementation NSBezierPath (Additions)

- (void)fillGradientFrom:(NSColor*)inStartColor to:(NSColor*)inEndColor angle:(float)inAngle {
	CIImage*	coreimage;

	inStartColor = [inStartColor colorUsingColorSpaceName:NSCalibratedRGBColorSpace];
	inEndColor = [inEndColor colorUsingColorSpaceName:NSCalibratedRGBColorSpace];

	CIColor* startColor = [CIColor colorWithRed:[inStartColor redComponent] green:[inStartColor greenComponent] blue:[inStartColor blueComponent] alpha:[inStartColor alphaComponent]];
	CIColor* endColor = [CIColor colorWithRed:[inEndColor redComponent] green:[inEndColor greenComponent] blue:[inEndColor blueComponent] alpha:[inEndColor alphaComponent]];

	CIFilter* filter;

	filter = [CIFilter filterWithName:@"CILinearGradient"];
	[filter setValue:startColor forKey:@"inputColor0"];
	[filter setValue:endColor forKey:@"inputColor1"];

	CIVector* startVector;
	CIVector* endVector;

	startVector = [CIVector vectorWithX:0.0 Y:0.0];
	endVector = [CIVector vectorWithX:0.0 Y:[self bounds].size.height];

	[filter setValue:startVector forKey:@"inputPoint0"];
	[filter setValue:endVector forKey:@"inputPoint1"];

	coreimage = [filter valueForKey:@"outputImage"];


	[[NSGraphicsContext currentContext] saveGraphicsState];

	CIContext* context;

	context = [[NSGraphicsContext currentContext] CIContext];

	[self setClip];

	[context drawImage:coreimage atPoint:CGPointZero fromRect:
        CGRectMake( 0.0, 0.0, [self bounds].size.width, [self bounds].size.height )];

	[[NSGraphicsContext currentContext] restoreGraphicsState];
}


@end





Use:

    NSColor *startColor = [NSColor colorWithCalibratedRed:0xff/255. green:0xff/255. blue:0xff/255. alpha:1.0];
    NSColor *endColor = [NSColor colorWithCalibratedRed:0x99/255. green:0x99/255. blue:0x99/255. alpha:1.0];

    NSBezierPath *path = [NSBezierPath bezierPathWithRect:eventsFrame];
    [path fillGradientFrom:startColor to:endColor angle:0.0];