Modify Makefile for macOS

Makefile

@@ -8,11 +8,11 @@ relational_gui/maingui.py relational_gui/survey.py relational_gui/rel_edit.py:
 	# Create .py file
 	pyuic5 $(basename $@).ui > $@
 	# Use my custom editor class
-	sed -i 's/QtWidgets.QPlainTextEdit/editor.Editor/g' $@
+	sed 's/QtWidgets.QPlainTextEdit/editor.Editor/g' $@
 	echo 'from . import editor' >> $@
 	# Use gettext instead of Qt translations
 	echo 'from gettext import gettext as _' >> $@
-	sed -i \
+	sed \
 		-e 's/_translate("MainWindow", /_(/g' \
 		-e 's/_translate("Dialog", /_(/g' \
 		-e 's/_translate("Form", /_(/g' \
@@ -86,7 +86,7 @@ install-python3-relational: install_translations
 install-relational:
 	python3 setup/relational.setup.py install --root=$${DESTDIR:-/};
 	rm -rf build;
-	install -D relational.py $${DESTDIR:-/}/usr/bin/relational
+	installD relational.py $${DESTDIR:-/}/usr/bin/relational
 	install -m0644 -D relational.desktop $${DESTDIR:-/}/usr/share/applications/relational.desktop
 	install -m0644 -D relational_gui/resources/relational.png $${DESTDIR:-/}/usr/share/pixmaps/relational.png
 	install -D relational.1 $${DESTDIR:-/}/usr/share/man/man1/relational.1