diff --git a/code/ryzom/tools/client/ryzom_installer/CMakeLists.txt b/code/ryzom/tools/client/ryzom_installer/CMakeLists.txt
index c66e35b61..b76b0e20d 100644
--- a/code/ryzom/tools/client/ryzom_installer/CMakeLists.txt
+++ b/code/ryzom/tools/client/ryzom_installer/CMakeLists.txt
@@ -60,7 +60,7 @@ ENDIF()
 ADD_EXECUTABLE(ryzom_installer_qt WIN32 MACOSX_BUNDLE ${SRC} ${CLIENT_INSTALL_MOC_SRC} ${CLIENT_INSTALL_UI_HDRS} ${CLIENT_INSTALL_RC_SRCS} ${CLIENT_INSTALL_TRANS} ${CLIENT_INSTALL_BASE_TRANS} ${CLIENT_INSTALL_QM})
 
 IF(APPLE)
-  SET_TARGET_PROPERTIES(ryzom_installer_qt PROPERTIES OUTPUT_NAME RyzomInstaller)
+  SET_TARGET_PROPERTIES(ryzom_installer_qt PROPERTIES OUTPUT_NAME ${MACOSX_BUNDLE_BUNDLE_NAME})
   SET_TARGET_PROPERTIES(ryzom_installer_qt PROPERTIES MACOSX_BUNDLE_INFO_PLIST ${MAC_RESOURCES_DIR}/Info.plist)
   ADD_CUSTOM_COMMAND(TARGET ryzom_installer_qt PRE_BUILD COMMAND mkdir -p ${RYZOM_RESOURCES_DIR})
   ADD_CUSTOM_COMMAND(TARGET ryzom_installer_qt POST_BUILD COMMAND cp ARGS -p ${MAC_RESOURCES_DIR}/PkgInfo ${RYZOM_CONTENTS_DIR})
diff --git a/code/ryzom/tools/client/ryzom_installer/src/installdialog.cpp b/code/ryzom/tools/client/ryzom_installer/src/installdialog.cpp
index 7198962ac..6ec2a49ed 100644
--- a/code/ryzom/tools/client/ryzom_installer/src/installdialog.cpp
+++ b/code/ryzom/tools/client/ryzom_installer/src/installdialog.cpp
@@ -35,17 +35,28 @@ CInstallDialog::CInstallDialog():QDialog()
 	// update default destination
 	onDestinationDefaultButtonClicked();
 
+#ifdef Q_OS_MAC
 	// check whether OS architecture is 32 or 64 bits
 	if (CConfigFile::has64bitsOS())
 	{
+		// 64 bits enbabled by default
 		clientArchGroupBox->setVisible(true);
 		clientArch64RadioButton->setChecked(true);
+		clientArch32RadioButton->setChecked(false);
 	}
 	else
 	{
+		// only 32 bits is available
 		clientArchGroupBox->setVisible(false);
+		clientArch64RadioButton->setChecked(false);
 		clientArch32RadioButton->setChecked(true);
 	}
+#else
+	// only 64 bits for OS X
+	clientArchGroupBox->setVisible(false);
+	clientArch64RadioButton->setChecked(true);
+	clientArch32RadioButton->setChecked(false);
+#endif
 
 	const CServer &server = CConfigFile::getInstance()->getServer();
 
diff --git a/code/ryzom/tools/client/ryzom_installer/src/migratedialog.cpp b/code/ryzom/tools/client/ryzom_installer/src/migratedialog.cpp
index 22e4f0ad2..f60abd95c 100644
--- a/code/ryzom/tools/client/ryzom_installer/src/migratedialog.cpp
+++ b/code/ryzom/tools/client/ryzom_installer/src/migratedialog.cpp
@@ -49,17 +49,28 @@ CMigrateDialog::CMigrateDialog():QDialog()
 	// update default destination
 	onDestinationDefaultButtonClicked();
 
+#ifdef Q_OS_MAC
 	// check whether OS architecture is 32 or 64 bits
 	if (CConfigFile::has64bitsOS())
 	{
+		// 64 bits enbabled by default
 		clientArchGroupBox->setVisible(true);
 		clientArch64RadioButton->setChecked(true);
+		clientArch32RadioButton->setChecked(false);
 	}
 	else
 	{
+		// only 32 bits is available
 		clientArchGroupBox->setVisible(false);
+		clientArch64RadioButton->setChecked(false);
 		clientArch32RadioButton->setChecked(true);
 	}
+#else
+	// only 64 bits for OS X
+	clientArchGroupBox->setVisible(false);
+	clientArch64RadioButton->setChecked(true);
+	clientArch32RadioButton->setChecked(false);
+#endif
 
 	const CServer &server = CConfigFile::getInstance()->getServer();