qt5: switch to Apple SDK 14 on -darwin platforms

Fixes weird linking errors seen with SDK 13.

pkgs/development/libraries/qt-5/modules/qtbase.nix

@@ -17,7 +17,7 @@
   python3,
   which,
   # darwin support
-  apple-sdk_13,
+  apple-sdk_14,
   xcbuild,
 
   dbus,
@@ -88,11 +88,9 @@ let
       throw "Please add a qtPlatformCross entry for ${plat.config}";
 
   # Per https://doc.qt.io/qt-5/macos.html#supported-versions: build SDK = 13.x or 14.x.
-  # Despite advertising support for the macOS 14 SDK, the build system sets the maximum to 13 and complains
-  # about 14, so we just use that.
-  deploymentTarget = "10.13";
+  # SDK 13.x causes weird linking errors on x86_64-darwin, so use 14.x
   darwinVersionInputs = [
-    apple-sdk_13
+    apple-sdk_14
   ];
 in
 

pkgs/development/libraries/qt-5/qtModule.nix

@@ -3,7 +3,7 @@
   stdenv,
   buildPackages,
   mkDerivation,
-  apple-sdk_13,
+  apple-sdk_14,
   perl,
   qmake,
   patches,
@@ -33,7 +33,7 @@ mkDerivation (
       args.buildInputs or [ ]
       # Per https://doc.qt.io/qt-5/macos.html#supported-versions
       ++ lib.optionals stdenv.hostPlatform.isDarwin [
-        apple-sdk_13
+        apple-sdk_14
       ];
 
     nativeBuildInputs =