diff --git a/ci/macos-presubmit.sh b/ci/macos-presubmit.sh
index 5fac6ae9..408f8f86 100644
--- a/ci/macos-presubmit.sh
+++ b/ci/macos-presubmit.sh
@@ -31,8 +31,13 @@
 
 set -euox pipefail
 
-# Use Xcode 16.0
-sudo xcode-select -s /Applications/Xcode_16.0.app/Contents/Developer
+# Use Xcode 26.2
+sudo xcode-select -s /Applications/Xcode_26.2.app/Contents/Developer
+
+brew install cmake
+
+export CMAKE_BUILD_PARALLEL_LEVEL=$(sysctl -n hw.ncpu)
+export CTEST_PARALLEL_LEVEL=$(sysctl -n hw.ncpu)
 
 if [[ -z ${GTEST_ROOT:-} ]]; then
   GTEST_ROOT="$(realpath $(dirname ${0})/..)"