diff --git a/app/build_mac.sh b/app/build_mac.sh
index b32cad4..2cc68a5 100644
--- a/app/build_mac.sh
+++ b/app/build_mac.sh
@@ -4,7 +4,7 @@
 #build dmg for mac install
 sleep 5s
 mkdir ../dist/installers
-./node_modules/.bin/electron-installer-dmg ../dist/mcopy-darwin-x64 mcopy --out=../dist/installers  --icon=assets/icons/icon.icns  --overwrite    
+./node_modules/.bin/electron-installer-dmg ../dist/mcopy-darwin-x64/mcopy.app mcopy --out=../dist/installers  --icon=assets/icons/icon.icns  --overwrite    
 # Path to the icon file that will be the app icon in the DMG window.
 #  --icon-size=<px>     How big to make the icon for the app in the DMG. [Default: `80`].
 #  --background=<path>  Path to a PNG image to use as the background of the DMG.