diff --git a/source/net/filebot/mac/MacAppUtilities.java b/source/net/filebot/mac/MacAppUtilities.java
index ab93685f..35dc43a9 100644
--- a/source/net/filebot/mac/MacAppUtilities.java
+++ b/source/net/filebot/mac/MacAppUtilities.java
@@ -48,20 +48,17 @@ public class MacAppUtilities {
 		final EventQueue eventQueue = Toolkit.getDefaultToolkit().getSystemEventQueue();
 		final SecondaryLoop secondaryLoop = eventQueue.createSecondaryLoop();
 
-		System.out.println("before dispatch_async");
+		// WARNING: dispatch_sync seems to work on most Mac always causes a deadlock and freezes the application on others (in particular MBP with 2 graphics chips)
 		dispatch_async(new Runnable() {
 
 			@Override
 			public void run() {
-				System.out.println("before NSOpenPanel");
 				Proxy peer = objc().sendProxy("NSOpenPanel", "openPanel");
 				peer.send("setTitle:", title);
 				peer.send("setAllowsMultipleSelection:", multipleMode ? 1 : 0);
-				System.out.println("before setCanChooseDirectories");
 				peer.send("setCanChooseDirectories:", canChooseDirectories ? 1 : 0);
 				peer.send("setCanChooseFiles:", canChooseFiles ? 1 : 0);
 
-				System.out.println("before NSMutableArray");
 				if (allowedFileTypes != null) {
 					Proxy mutableArray = objc().sendProxy("NSMutableArray", "arrayWithCapacity:", allowedFileTypes.length);
 					for (String type : allowedFileTypes) {
@@ -70,7 +67,6 @@ public class MacAppUtilities {
 					peer.send("setAllowedFileTypes:", mutableArray);
 				}
 
-				System.out.println("before runModal");
 				if (peer.sendInt("runModal") != 0) {
 					Proxy nsArray = peer.getProxy("URLs");
 					int size = nsArray.sendInt("count");
@@ -81,17 +77,14 @@ public class MacAppUtilities {
 					}
 				}
 
-				System.out.println("before secondaryLoop.exit");
 				secondaryLoop.exit();
 			}
 		});
 
 		// Enter the loop to block the current event handler, but leave UI responsive
-		System.out.println("before secondaryLoop.enter");
 		if (!secondaryLoop.enter()) {
 			throw new RuntimeException("SecondaryLoop.enter()");
 		}
-		System.out.println("after secondaryLoop.enter");
 
 		return result;
 	}