corrected the check for Mac OS

Issue-Ref: 2443

Signed-off-by: Sudeep Kanav <kanav@fortiss.org>

org.fortiss.tooling.base/src/org/fortiss/tooling/base/utils/.ratings

@@ -13,6 +13,6 @@ PointUtils.java b21c92cc8e80ece9d87ede8a750f4de314379743 GREEN
 PointsUtils.java bad69811c59004948929f6a57edd5a79c0bf8643 GREEN
 RectangleLayoutUtils.java cdd61d162761da7f3e1d3512264135b9b0d564ff GREEN
 SnapToGridUtils.java 413785d7a8655db31a129b6f821e1d5f859aa726 GREEN
-SystemUtils.java 622dd176fa0febc1e92845cb0f988e503cc30efb YELLOW
+SystemUtils.java f7893a7db34a994534608bcbd7f214a701c5cf55 YELLOW
 VisualizationModelElementFactory.java 18e67450ee4cf4a03dc88a10becb0fb6ce4c1bad GREEN
 ZoomUtils.java a339613fde18281bed3b55b529a053d348545bc7 GREEN

org.fortiss.tooling.base/src/org/fortiss/tooling/base/utils/SystemUtils.java

@@ -68,7 +68,7 @@ public class SystemUtils {
 			return isMacOSXPlatform;
 		}
 		String osName = System.getProperty("os.name");
-		isMacOSXPlatform = osName != null && osName.contains("Mac OS X.");
+		isMacOSXPlatform = osName != null && osName.contains("Mac OS X");
 		return isMacOSXPlatform;
 	}