diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index 7288b0d..2d31e48 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -46,6 +46,9 @@ jobs:
       - name: Install prerequisites
         shell: bash -l {0}
         run: |
+          ruby - e  "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null  2 > /dev/null
+          brew reinstall --build-from-source cmake
+          ln -s /usr/local/Cellar/cmake/3.27.1 /usr/local/Cellar/cmake/3.26.4
           brew install create-dmg
           if [ ! -d "./opencv" ]; then
             ruby - e  "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null  2 > /dev/null
diff --git a/src/YUVviewer.cpp b/src/YUVviewer.cpp
index 7baa115..c53583f 100644
--- a/src/YUVviewer.cpp
+++ b/src/YUVviewer.cpp
@@ -17,6 +17,7 @@
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
+#include <iostream>
 #include <QApplication>
 #include <QScreen>
 #include <QMessageBox>