diff --git a/CI/MacOS/mac-build.yml b/CI/MacOS/mac-build.yml
index 12d766988..3c4e8a37a 100644
--- a/CI/MacOS/mac-build.yml
+++ b/CI/MacOS/mac-build.yml
@@ -86,7 +86,7 @@ steps:
         dmgbuild \
           -s CI/MacOS/installator_settings.py \
           -D app=$(Build.Repository.LocalPath)/build/bundle/Synergy.app \
-          -D background=$(Build.Repository.LocalPath)/build/bundle/Synergy.app/Contents/Resources/installer_background.png \
+          -D background=$(Build.Repository.LocalPath)/build/bundle/Synergy.app/Contents/Resources/installer_background.tiff \
           "Synergy" \
           $(SYNERGY_DMG_FILENAME)
         mkdir pkg
diff --git a/dist/macos/bundle/Synergy.app/Contents/Resources/installer_background.png b/dist/macos/bundle/Synergy.app/Contents/Resources/installer_background.png
deleted file mode 100644
index 57125e638..000000000
Binary files a/dist/macos/bundle/Synergy.app/Contents/Resources/installer_background.png and /dev/null differ
diff --git a/dist/macos/bundle/Synergy.app/Contents/Resources/installer_background.tiff b/dist/macos/bundle/Synergy.app/Contents/Resources/installer_background.tiff
new file mode 100644
index 000000000..e13ab35b3
Binary files /dev/null and b/dist/macos/bundle/Synergy.app/Contents/Resources/installer_background.tiff differ