diff --git a/.gitlab/os-macos.yml b/.gitlab/os-macos.yml
index 92602a7fa8..7b13dee815 100644
--- a/.gitlab/os-macos.yml
+++ b/.gitlab/os-macos.yml
@@ -5,15 +5,20 @@
 .macos:
     variables:
         GIT_CLONE_PATH: "$CI_BUILDS_DIR/cmake ci ext/$CI_CONCURRENT_ID"
-        # TODO: Factor this out so that each job selects the Xcode version to
-        # use so that different versions can be tested in a single pipeline.
+
+.macos_arm64:
+    extends: .macos
+    variables:
+        DEVELOPER_DIR: "/Applications/Xcode-26.4.app/Contents/Developer"
+
+.macos_x86_64:
+    extends: .macos
+    variables:
         DEVELOPER_DIR: "/Applications/Xcode-26.3.app/Contents/Developer"
 
 ### Build and test
 
 .macos_build:
-    extends: .macos
-
     variables:
         # Note that shell runners only support runners with a single
         # concurrency level. We can't use `$CI_CONCURRENCY_ID` because this may
@@ -22,8 +27,18 @@
         # could run at the same time, so we drop it.
         GIT_CLONE_PATH: "$CI_BUILDS_DIR/cmake ci"
 
+.macos_arm64_build:
+    extends:
+        - .macos_arm64
+        - .macos_build
+
+.macos_x86_64_build:
+    extends:
+        - .macos_x86_64
+        - .macos_build
+
 .macos_x86_64_ninja:
-    extends: .macos_build
+    extends: .macos_x86_64_build
 
     variables:
         CMAKE_CONFIGURATION: macos_x86_64_ninja
@@ -31,7 +46,7 @@
         CTEST_NO_WARNINGS_ALLOWED: 1
 
 .macos_arm64_ninja:
-    extends: .macos_build
+    extends: .macos_arm64_build
 
     variables:
         CMAKE_CONFIGURATION: macos_arm64_ninja
@@ -39,7 +54,7 @@
         CTEST_NO_WARNINGS_ALLOWED: 1
 
 .macos_arm64_ninja_symlinked:
-    extends: .macos_build
+    extends: .macos_arm64_build
 
     variables:
         CMAKE_CONFIGURATION: macos_arm64_ninja_symlinked
@@ -54,7 +69,7 @@
         CMAKE_CONFIGURATION: macos_arm64_pch
 
 .macos_x86_64_makefiles:
-    extends: .macos_build
+    extends: .macos_x86_64_build
 
     variables:
         CMAKE_CONFIGURATION: macos_x86_64_makefiles
@@ -62,7 +77,7 @@
         CMAKE_GENERATOR: "Unix Makefiles"
 
 .macos_package:
-    extends: .macos_build
+    extends: .macos_arm64_build
 
     variables:
         CMAKE_CONFIGURATION: macos_package
@@ -70,7 +85,7 @@
         CMAKE_CI_NO_INSTALL: 1
 
 .macos10.10_package:
-    extends: .macos_build
+    extends: .macos_arm64_build
 
     variables:
         CMAKE_CONFIGURATION: macos10.10_package
@@ -85,7 +100,7 @@
 ### External testing
 
 .macos_x86_64_xcode:
-    extends: .macos
+    extends: .macos_x86_64
 
     variables:
         CMAKE_CONFIGURATION: macos_x86_64_xcode
@@ -93,7 +108,7 @@
         CMAKE_CI_JOB_NIGHTLY_IGNORE_DEPS: "true"
 
 .macos_arm64_xcode:
-    extends: .macos
+    extends: .macos_arm64
 
     variables:
         CMAKE_CONFIGURATION: macos_arm64_xcode
@@ -101,7 +116,7 @@
         CMAKE_CI_JOB_NIGHTLY_IGNORE_DEPS: "true"
 
 .macos_arm64_xcode_symlinked:
-    extends: .macos
+    extends: .macos_arm64
 
     variables:
         CMAKE_CONFIGURATION: macos_arm64_xcode_symlinked
@@ -111,7 +126,7 @@
         CMAKE_CI_BUILD_DIR: "real_work/work/build"
 
 .macos_arm64_xcode_ub:
-    extends: .macos
+    extends: .macos_arm64
 
     variables:
         CMAKE_CONFIGURATION: macos_arm64_xcode_ub
@@ -119,7 +134,7 @@
         CMAKE_CI_JOB_NIGHTLY_IGNORE_DEPS: "true"
 
 .macos_arm64_ninja_multi:
-    extends: .macos
+    extends: .macos_arm64
 
     variables:
         CMAKE_CONFIGURATION: macos_arm64_ninja_multi
@@ -127,14 +142,14 @@
         CMAKE_CI_JOB_NIGHTLY_IGNORE_DEPS: "true"
 
 .macos_x86_64_ninja_ub:
-    extends: .macos
+    extends: .macos_x86_64
 
     variables:
         CMAKE_CONFIGURATION: macos_x86_64_ninja_ub
         CMAKE_CI_JOB_NIGHTLY_IGNORE_DEPS: "true"
 
 .macos_arm64_fastbuild:
-    extends: .macos
+    extends: .macos_arm64
 
     variables:
         CMAKE_CONFIGURATION: macos_arm64_fastbuild
@@ -164,7 +179,7 @@
         - cmake # Since this is a bare runner, pin to a project.
         - macos-arm64
         - shell
-        - xcode-26.3
+        - xcode-26.4
         - nonconcurrent
 
 .macos_arm64_tags_ext:
@@ -172,7 +187,7 @@
         - cmake # Since this is a bare runner, pin to a project.
         - macos-arm64
         - shell
-        - xcode-26.3
+        - xcode-26.4
         - concurrent
 
 .macos_arm64_tags_package:
@@ -180,7 +195,7 @@
         - cmake # Since this is a bare runner, pin to a project.
         - macos-arm64
         - shell
-        - xcode-26.3
+        - xcode-26.4
         - nonconcurrent
         - finder
 
diff --git a/CTestCustom.cmake.in b/CTestCustom.cmake.in
index 6daca61cf9..75642c9128 100644
--- a/CTestCustom.cmake.in
+++ b/CTestCustom.cmake.in
@@ -12,8 +12,8 @@ list(APPEND CTEST_CUSTOM_WARNING_EXCEPTION
   "warning: \\(Long double usage is reported only once for each file"
   "warning: To disable this warning use"
   "could not be inlined"
-  "libcm(curl|expat).*has no symbols"
-  "cm(curl|expat).build/[^ ]*.o has no symbols"
+  "libcm(curl|expat|zstd).*has no symbols"
+  "cm(curl|expat|zstd).build/[^ ]*.o has no symbols"
   "not sorted slower link editing will result"
   "stl_deque.h:479"
   "Utilities.cmzlib."
diff --git a/Tests/RunCMake/CMP0156/CMP0156-NEW-AppleClang-Imported-build-stdout.txt b/Tests/RunCMake/CMP0156/CMP0156-NEW-AppleClang-Imported-build-stdout.txt
index c60296760a..3828e20fc9 100644
--- a/Tests/RunCMake/CMP0156/CMP0156-NEW-AppleClang-Imported-build-stdout.txt
+++ b/Tests/RunCMake/CMP0156/CMP0156-NEW-AppleClang-Imported-build-stdout.txt
@@ -1,3 +1,5 @@
-ld: warning: ignoring duplicate libraries: '[^']*liblib1\.a'
+[^
+]*ld: warning: ignoring duplicate libraries: '[^']*liblib1\.a'
 ld: fatal warning\(s\) induced error \(-fatal_warnings\)
-(cc|clang): error: linker command failed with exit code 1 \(use -v to see invocation\)
+[^
+]*(cc|clang): error: linker command failed with exit code 1 \(use -v to see invocation\)
diff --git a/Tests/RunCMake/CMP0156/CMP0156-OLD-AppleClang-build-stdout.txt b/Tests/RunCMake/CMP0156/CMP0156-OLD-AppleClang-build-stdout.txt
index 28dfd44a5a..d01e5a92db 100644
--- a/Tests/RunCMake/CMP0156/CMP0156-OLD-AppleClang-build-stdout.txt
+++ b/Tests/RunCMake/CMP0156/CMP0156-OLD-AppleClang-build-stdout.txt
@@ -1,3 +1,5 @@
-ld: warning: ignoring duplicate libraries: '[^']*liblib1\.a', '[^']*liblib2\.a'
+[^
+]*ld: warning: ignoring duplicate libraries: '[^']*liblib1\.a', '[^']*liblib2\.a'
 ld: fatal warning\(s\) induced error \(-fatal_warnings\)
-(cc|clang): error: linker command failed with exit code 1 \(use -v to see invocation\)
+[^
+]*(cc|clang): error: linker command failed with exit code 1 \(use -v to see invocation\)
diff --git a/Tests/RunCMake/LinkStatic/CMAKE_STATIC_LINKER_FLAGS.cmake b/Tests/RunCMake/LinkStatic/CMAKE_STATIC_LINKER_FLAGS.cmake
index f2ef5d1c0c..bdc367f0a8 100644
--- a/Tests/RunCMake/LinkStatic/CMAKE_STATIC_LINKER_FLAGS.cmake
+++ b/Tests/RunCMake/LinkStatic/CMAKE_STATIC_LINKER_FLAGS.cmake
@@ -4,6 +4,8 @@ enable_language(C)
 set(obj "${CMAKE_C_OUTPUT_EXTENSION}")
 if(BORLAND)
   set(pre -)
+elseif(XCODE)
+  set(pre --badflag=)
 endif()
 
 set(CMAKE_STATIC_LINKER_FLAGS ${pre}BADFLAG${obj})
diff --git a/Tests/RunCMake/LinkStatic/CMAKE_STATIC_LINKER_FLAGS_CONFIG.cmake b/Tests/RunCMake/LinkStatic/CMAKE_STATIC_LINKER_FLAGS_CONFIG.cmake
index 5c29274a0a..2f7303805e 100644
--- a/Tests/RunCMake/LinkStatic/CMAKE_STATIC_LINKER_FLAGS_CONFIG.cmake
+++ b/Tests/RunCMake/LinkStatic/CMAKE_STATIC_LINKER_FLAGS_CONFIG.cmake
@@ -4,6 +4,8 @@ enable_language(C)
 set(obj "${CMAKE_C_OUTPUT_EXTENSION}")
 if(BORLAND)
   set(pre -)
+elseif(XCODE)
+  set(pre --badflag=)
 endif()
 
 # CMAKE_STATIC_LINKER_FLAGS_<CONFIG> variant
diff --git a/Tests/RunCMake/LinkStatic/STATIC_LIBRARY_FLAGS.cmake b/Tests/RunCMake/LinkStatic/STATIC_LIBRARY_FLAGS.cmake
index d654b4e3f9..07fc6b3d1e 100644
--- a/Tests/RunCMake/LinkStatic/STATIC_LIBRARY_FLAGS.cmake
+++ b/Tests/RunCMake/LinkStatic/STATIC_LIBRARY_FLAGS.cmake
@@ -4,6 +4,8 @@ enable_language(C)
 set(obj "${CMAKE_C_OUTPUT_EXTENSION}")
 if(BORLAND)
   set(pre -)
+elseif(XCODE)
+  set(pre --badflag=)
 endif()
 
 add_library(StaticLinkFlags STATIC LinkOptionsLib.c)
diff --git a/Tests/RunCMake/LinkStatic/STATIC_LIBRARY_OPTIONS.cmake b/Tests/RunCMake/LinkStatic/STATIC_LIBRARY_OPTIONS.cmake
index 587af1d96e..dfa8b4f05b 100644
--- a/Tests/RunCMake/LinkStatic/STATIC_LIBRARY_OPTIONS.cmake
+++ b/Tests/RunCMake/LinkStatic/STATIC_LIBRARY_OPTIONS.cmake
@@ -4,6 +4,8 @@ enable_language(C)
 set(obj "${CMAKE_C_OUTPUT_EXTENSION}")
 if(BORLAND)
   set(pre -)
+elseif(XCODE)
+  set(pre --badflag=)
 endif()
 
 add_library(StaticLinkOptions STATIC LinkOptionsLib.c)