diff --git a/coprocessorjs.c b/coprocessorjs.c
index ad40fba..b2b5443 100644
--- a/coprocessorjs.c
+++ b/coprocessorjs.c
@@ -12,7 +12,7 @@
 IOParam outgoingSerialPortReference;
 IOParam incomingSerialPortReference;
 // #define PRINT_ERRORS 1
-// #define DEBUGGING 1
+#define DEBUGGING 1
 #define MAX_ATTEMPTS 10
 #define RECEIVE_WINDOW_SIZE 32767 // receive in up to 32kb chunks
 #define MAX_RECEIVE_SIZE 32767 // matching RECEIVE_WINDOW_SIZE for now
diff --git a/dist/MessagesForMacintosh.dsk b/dist/MessagesForMacintosh.dsk
index 8a5b646..46da517 100644
Binary files a/dist/MessagesForMacintosh.dsk and b/dist/MessagesForMacintosh.dsk differ
diff --git a/dist/MessagesForMacintosh.zip b/dist/MessagesForMacintosh.zip
index ed0ed8f..ebd5f3d 100644
Binary files a/dist/MessagesForMacintosh.zip and b/dist/MessagesForMacintosh.zip differ
diff --git a/mac_main.c b/mac_main.c
index ab0e0d1..a1b9e46 100644
--- a/mac_main.c
+++ b/mac_main.c
@@ -25,7 +25,7 @@
 
 // #define MAC_APP_DEBUGGING
 // #define PROFILING 1
-// #define DEBUG_FUNCTION_CALLS
+#define DEBUG_FUNCTION_CALLS
 #ifdef PROFILING
 
 OSErr writeSerialPortProfile(const char* str)