diff --git a/src/main/java/org/apposed/appose/shm/ShmMacOS.java b/src/main/java/org/apposed/appose/shm/ShmMacOS.java
index 2afeb87..2d6c3a4 100644
--- a/src/main/java/org/apposed/appose/shm/ShmMacOS.java
+++ b/src/main/java/org/apposed/appose/shm/ShmMacOS.java
@@ -112,6 +112,7 @@ private static ShmInfo<Integer> prepareShm(String name, boolean create, int size
 			ShmInfo<Integer> info = new ShmInfo<>();
 			info.size = size;
 			info.totalSize = shm_size;
+			System.out.println("ShmMacOS: size=" + size + ", totalSize=" + shm_size);
 			info.name = withoutLeadingSlash(shm_name);
 			info.pointer = pointer;
 			info.handle = shmFd;