--- growl/Growl.xcodeproj/project.pbxproj	2012-12-12 07:18:11.000000000 +0100
+++ growl/Growl.xcodeproj/project.pbxproj	2020-08-31 16:50:03.000000000 +0200
@@ -5667,6 +5667,7 @@
 			buildSettings = {
 				COMBINE_HIDPI_IMAGES = YES;
 				PRODUCT_NAME = Revision;
+				SDKROOT = macosx;
 			};
 			name = Localization;
 		};
@@ -5794,6 +5795,7 @@
 			buildSettings = {
 				COMBINE_HIDPI_IMAGES = YES;
 				PRODUCT_NAME = Revision;
+				SDKROOT = macosx;
 			};
 			name = Debug;
 		};
@@ -5803,6 +5805,7 @@
 			buildSettings = {
 				COMBINE_HIDPI_IMAGES = YES;
 				PRODUCT_NAME = Revision;
+				SDKROOT = macosx;
 			};
 			name = Release;
 		};