diff --git a/OSBindings/Mac/Clock SignalTests/68000ComparativeTests.mm b/OSBindings/Mac/Clock SignalTests/68000ComparativeTests.mm
index 2f555f34c..cec3017f1 100644
--- a/OSBindings/Mac/Clock SignalTests/68000ComparativeTests.mm	
+++ b/OSBindings/Mac/Clock SignalTests/68000ComparativeTests.mm	
@@ -43,7 +43,7 @@
 	// Issue each test file.
 	for(NSURL *url in tests) {
 		// Compare against a file set if one has been supplied.
-		if(_fileSet && ![_fileSet containsObject:[[url path] lastPathComponent]]) continue;
+		if(_fileSet && ![_fileSet containsObject:[url lastPathComponent]]) continue;
 		NSLog(@"Testing %@", url);
 		[self testJSONAtURL:url];
 	}
diff --git a/OSBindings/Mac/Clock SignalTests/EmuTOSTests.mm b/OSBindings/Mac/Clock SignalTests/EmuTOSTests.mm
index ad5dbb163..9c50a04a5 100644
--- a/OSBindings/Mac/Clock SignalTests/EmuTOSTests.mm	
+++ b/OSBindings/Mac/Clock SignalTests/EmuTOSTests.mm	
@@ -107,7 +107,7 @@ class EmuTOS: public ComparativeBusHandler {
 	const std::vector<ROMMachine::ROM> rom_names = {{"AtariST", "", image.UTF8String, 0, 0 }};
 	const auto roms = CSROMFetcher()(rom_names);
 	NSString *const traceLocation = [[NSBundle bundleForClass:[self class]] pathForResource:trace ofType:@"trace.txt.gz"];
-	_machine = std::make_unique<EmuTOS>(*roms[0], traceLocation.UTF8String);
+	_machine = std::make_unique<EmuTOS>(*roms[0], traceLocation.fileSystemRepresentation);
 	_machine->run_for(HalfCycles(length));
 }