[libc++] Install psutil on the macOS nodes

diff --git a/libcxx/utils/ci/macos-ci-setup b/libcxx/utils/ci/macos-ci-setup
index 3c4ace3..fc3a6f0 100755 (executable)
--- a/libcxx/utils/ci/macos-ci-setup
+++ b/libcxx/utils/ci/macos-ci-setup
@@ -103,6 +103,7 @@ else
       brew install "${package}"
     fi
   done
+  python3 -m pip install --upgrade psutil
 
   echo "Setting up BuildKite Agent config"
   version="$(sw_vers -productVersion | sed -E 's/([0-9]+).([0-9]+).[0-9]+/\1.\2/')"