diff -ruN /Applications/Xcode_26.0.0-beta5.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h /Applications/Xcode_26.0.0-beta6.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h
--- /Applications/Xcode_26.0.0-beta5.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h	2025-07-31 07:35:14
+++ /Applications/Xcode_26.0.0-beta6.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h	2025-08-13 07:16:38
@@ -166,7 +166,7 @@
 /// Generates an HDR color in the extended sRGB colorspace by applying an exposure to the SDR color defined by the red, green, and blue components. The `red`, `green`, and `blue` components have a nominal range of [0..1], `linearExposure` is a value >= 1. To produce an HDR color, we process the given color in a linear color space, multiplying component values by `linearExposure `. The produced color will have a `contentHeadroom` equal to `linearExposure`. Each doubling of `linearExposure` produces a color that is twice as bright.
 + (NSColor *)colorWithRed:(CGFloat)red green:(CGFloat)green blue:(CGFloat)blue alpha:(CGFloat)alpha linearExposure:(CGFloat)linearExposure API_AVAILABLE(macos(26.0));
 
-/// Reinterpret the color by applying a new `contentHeadroom` without changing the color components. Changing the `contentHeadroom` redefines the color relative to a different peak white, changing its behavior under tone mapping and the result of calling `standardDynamicRangeColor`. The new color will have a `contentHeadroom` >= 1.0. If called on a color with a color space that does not support extended range, this will return `self`.
+/// Reinterpret the color by applying a new `contentHeadroom` without changing the color components. Changing the `contentHeadroom` redefines the color relative to a different peak white, changing its behavior under tone mapping and the result of calling `standardDynamicRangeColor`. The new color will have a `contentHeadroom` >= 1.0. If called on a color with a color space that does not support extended range, or does not have an equivalent extended range counterpart, this will return `self`.
 - (NSColor *)colorByApplyingContentHeadroom:(CGFloat)contentHeadroom API_AVAILABLE(macos(26.0));
 
 /// In some cases it is useful to recover the color that was base the SDR color that was exposed to generate an HDR color. If a color's `linearExposure` is > 1, then this will return the base SDR color. If the color is not an HDR color, this will return `self`.