diff --git a/src/plugins/debugger/gdb/plaingdbadapter.cpp b/src/plugins/debugger/gdb/plaingdbadapter.cpp
index fbcf96c8605..c0e0908666d 100644
--- a/src/plugins/debugger/gdb/plaingdbadapter.cpp
+++ b/src/plugins/debugger/gdb/plaingdbadapter.cpp
@@ -60,7 +60,8 @@ PlainGdbAdapter::PlainGdbAdapter(GdbEngine *engine, QObject *parent)
 
 AbstractGdbAdapter::DumperHandling PlainGdbAdapter::dumperHandling() const
 {
-#ifdef Q_OS_WIN
+    // LD_PRELOAD fails for System-Qt on Mac.
+#if defined(Q_OS_WIN) || defined(Q_OS_MAC)
     return DumperLoadedByGdb;
 #else
     return DumperLoadedByGdbPreload;
diff --git a/src/plugins/debugger/gdb/termgdbadapter.cpp b/src/plugins/debugger/gdb/termgdbadapter.cpp
index 5461d175bf2..613aaa79f30 100644
--- a/src/plugins/debugger/gdb/termgdbadapter.cpp
+++ b/src/plugins/debugger/gdb/termgdbadapter.cpp
@@ -71,7 +71,8 @@ TermGdbAdapter::~TermGdbAdapter()
 
 AbstractGdbAdapter::DumperHandling TermGdbAdapter::dumperHandling() const
 {
-#ifdef Q_OS_WIN    
+    // LD_PRELOAD fails for System-Qt on Mac.
+#if defined(Q_OS_WIN) || defined(Q_OS_MAC)
     return DumperLoadedByGdb;
 #else
     return DumperLoadedByAdapter; // Handles loading itself via LD_PRELOAD