diff --git a/CMakeLists.txt b/CMakeLists.txt
index c372660d..342d45ef 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -173,7 +173,7 @@ if(Launcher_LAYOUT_REAL STREQUAL "mac-bundle")
     # Mac bundle settings
     set(MACOSX_BUNDLE_BUNDLE_NAME "${Launcher_Name}")
     set(MACOSX_BUNDLE_INFO_STRING "${Launcher_Name}:  Minecraft launcher and management utility.")
-    set(MACOSX_BUNDLE_GUI_IDENTIFIER "org.multimc.${Launcher_Name}")
+    set(MACOSX_BUNDLE_GUI_IDENTIFIER "org.polymc.${Launcher_Name}")
     set(MACOSX_BUNDLE_BUNDLE_VERSION "${Launcher_VERSION_MAJOR}.${Launcher_VERSION_MINOR}.${Launcher_VERSION_HOTFIX}.${Launcher_VERSION_BUILD}")
     set(MACOSX_BUNDLE_SHORT_VERSION_STRING "${Launcher_VERSION_MAJOR}.${Launcher_VERSION_MINOR}.${Launcher_VERSION_HOTFIX}.${Launcher_VERSION_BUILD}")
     set(MACOSX_BUNDLE_LONG_VERSION_STRING "${Launcher_VERSION_MAJOR}.${Launcher_VERSION_MINOR}.${Launcher_VERSION_HOTFIX}.${Launcher_VERSION_BUILD}")