native tabs require macOS 10.13 at least

src/vs/workbench/electron-browser/desktop.contribution.ts

@@ -308,7 +308,7 @@ import { IJSONContributionRegistry, Extensions as JSONExtensions } from 'vs/plat
 				'default': false,
 				'scope': ConfigurationScope.APPLICATION,
 				'description': nls.localize('window.nativeTabs', "Enables macOS Sierra window tabs. Note that changes require a full restart to apply and that native tabs will disable a custom title bar style if configured."),
-				'included': isMacintosh && parseFloat(os.release()) >= 16 // Minimum: macOS Sierra (10.12.x = darwin 16.x)
+				'included': isMacintosh && parseFloat(os.release()) >= 17 // Minimum: macOS Sierra (10.13.x = darwin 17.x)
 			},
 			'window.nativeFullScreen': {
 				'type': 'boolean',