diff --git a/common/src/main/java/ctbrec/OS.java b/common/src/main/java/ctbrec/OS.java
index 76f759cc..b97ebb61 100644
--- a/common/src/main/java/ctbrec/OS.java
+++ b/common/src/main/java/ctbrec/OS.java
@@ -86,10 +86,16 @@ public class OS {
                 System.arraycopy(args, 0, cmd, 1, args.length);
                 break;
             case MAC:
-                cmd = new String[args.length + 2];
-                cmd[0] = "open";
-                cmd[1] = new File(browserDir, "ctbrec-minimal-browser.app").getAbsolutePath();
-                System.arraycopy(args, 0, cmd, 2, args.length);
+                cmd = new String[args.length + 5];
+                int index = 0;
+                cmd[index++] = "open";
+                cmd[index++] = "-W";
+                cmd[index++] = "-a";
+                cmd[index++] = new File(browserDir, "ctbrec-minimal-browser.app").getAbsolutePath();
+                if (args.length > 0) {
+                    cmd[index] = "--args";
+                    System.arraycopy(args, 0, cmd, 5, args.length);
+                }
                 break;
             default:
                 throw new UnsupportedOperatingSystemException(System.getProperty(OS_NAME));