diff --git a/macos/Sources/Ghostty/SurfaceView_AppKit.swift b/macos/Sources/Ghostty/SurfaceView_AppKit.swift
index 93c8e467f..37de41093 100644
--- a/macos/Sources/Ghostty/SurfaceView_AppKit.swift
+++ b/macos/Sources/Ghostty/SurfaceView_AppKit.swift
@@ -415,6 +415,7 @@ extension Ghostty {
             // the compositor.
             //
             // Ref: High Resolution Guidelines for OS X
+            // https://developer.apple.com/library/archive/documentation/GraphicsAnimation/Conceptual/HighResolutionOSX/CapturingScreenContents/CapturingScreenContents.html#//apple_ref/doc/uid/TP40012302-CH10-SW27
             if let window = window {
                 layer?.contentsScale = window.backingScaleFactor
             }