fix: don't allow portable builds on macOS

CMakeLists.txt

@@ -169,8 +169,10 @@ add_subdirectory(program_info)
 # Target install directory, relative to CMAKE_INSTALL_PREFIx
 set(BUNDLE_DEST_DIR ".")
 
+if(NOT (UNIX AND APPLE))
     # Install "portable.txt" if selected component is "portable"
     install(FILES "${CMAKE_CURRENT_SOURCE_DIR}/${Launcher_Portable_File}" DESTINATION ${BUNDLE_DEST_DIR} COMPONENT portable EXCLUDE_FROM_ALL)
+endif()
 
 if(UNIX AND APPLE)
     set(BINARY_DEST_DIR "${Launcher_Name}.app/Contents/MacOS")

launcher/Application.cpp

@@ -363,10 +363,12 @@ Application::Application(int &argc, char **argv) : QApplication(argc, argv)
         }
 #endif
 
+#ifndef Q_OS_MACOS
         if (QFile::exists(FS::PathCombine(m_rootPath, "portable.txt"))) {
             dataPath = m_rootPath;
             adjustedBy = "Portable data path";
         }
+#endif
     }
 
     if (!FS::ensureFolderPathExists(dataPath))