diff --git a/src/musredit_qt5/mupp/Pmupp.cpp b/src/musredit_qt5/mupp/Pmupp.cpp
index ec6a51bd..b54c0cb9 100644
--- a/src/musredit_qt5/mupp/Pmupp.cpp
+++ b/src/musredit_qt5/mupp/Pmupp.cpp
@@ -297,7 +297,7 @@ bool PParamDataHandler::ReadParamFile(const QStringList fln, QString &errorMsg)
 
     QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
 #if defined(Q_OS_DARWIN)
-    env.insert("DYLD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:" + env.value("DYLD_LIBRARY_PATH"));
+    env.insert("DYLD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:/usr/local/lib:" + env.value("DYLD_LIBRARY_PATH"));
 #else
     env.insert("LD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:" + env.value("LD_LIBRARY_PATH"));
 #endif
diff --git a/src/musredit_qt5/mupp/PmuppGui.cpp b/src/musredit_qt5/mupp/PmuppGui.cpp
index 488610c8..159307a2 100644
--- a/src/musredit_qt5/mupp/PmuppGui.cpp
+++ b/src/musredit_qt5/mupp/PmuppGui.cpp
@@ -2425,7 +2425,7 @@ void PmuppGui::startMuppPlot()
 
   // make sure that the system environment variables are properly set
 #if defined(Q_OS_DARWIN)
-  env.insert("DYLD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:" + env.value("DYLD_LIBRARY_PATH"));
+  env.insert("DYLD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:/usr/local/lib:" + env.value("DYLD_LIBRARY_PATH"));
 #else
   env.insert("LD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:" + env.value("LD_LIBRARY_PATH"));
 #endif
diff --git a/src/musredit_qt5/mupp/PmuppScript.cpp b/src/musredit_qt5/mupp/PmuppScript.cpp
index 887cff08..1c2a36be 100644
--- a/src/musredit_qt5/mupp/PmuppScript.cpp
+++ b/src/musredit_qt5/mupp/PmuppScript.cpp
@@ -522,7 +522,7 @@ int PmuppScript::plot(const QString str)
 
   QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
 #if defined(Q_OS_DARWIN)
-  env.insert("DYLD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:" + env.value("DYLD_LIBRARY_PATH"));
+  env.insert("DYLD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:/usr/local/lib:" + env.value("DYLD_LIBRARY_PATH"));
 #else
   env.insert("LD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:" + env.value("LD_LIBRARY_PATH"));
 #endif
diff --git a/src/musredit_qt5/musredit/PDumpOutputHandler.cpp b/src/musredit_qt5/musredit/PDumpOutputHandler.cpp
index 9dc78759..10912ae6 100644
--- a/src/musredit_qt5/musredit/PDumpOutputHandler.cpp
+++ b/src/musredit_qt5/musredit/PDumpOutputHandler.cpp
@@ -63,7 +63,7 @@ PDumpOutputHandler::PDumpOutputHandler(QVector<QString> &cmd)
   // make sure that the system environment variables are properly set
   QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
 #if defined(Q_OS_DARWIN)
-  env.insert("DYLD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:" + env.value("DYLD_LIBRARY_PATH"));
+  env.insert("DYLD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:/usr/local/lib:" + env.value("DYLD_LIBRARY_PATH"));
 #else
   env.insert("LD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:" + env.value("LD_LIBRARY_PATH"));
 #endif
diff --git a/src/musredit_qt5/musredit/PTextEdit.cpp b/src/musredit_qt5/musredit/PTextEdit.cpp
index 4aa45b7d..ac4feb58 100644
--- a/src/musredit_qt5/musredit/PTextEdit.cpp
+++ b/src/musredit_qt5/musredit/PTextEdit.cpp
@@ -1998,7 +1998,7 @@ void PTextEdit::musrWiz()
   // make sure that the system environment variables are properly set
   QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
 #if defined(Q_OS_DARWIN)
-  env.insert("DYLD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:" + env.value("DYLD_LIBRARY_PATH"));
+  env.insert("DYLD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:/usr/local/lib:" + env.value("DYLD_LIBRARY_PATH"));
 #else
   env.insert("LD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:" + env.value("LD_LIBRARY_PATH"));
 #endif
@@ -2559,7 +2559,7 @@ void PTextEdit::musrView()
   // make sure that the system environment variables are properly set
   QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
 #if defined(Q_OS_DARWIN)
-  env.insert("DYLD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:" + env.value("DYLD_LIBRARY_PATH"));
+  env.insert("DYLD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:/usr/local/lib:" + env.value("DYLD_LIBRARY_PATH"));
 #else
   env.insert("LD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:" + env.value("LD_LIBRARY_PATH"));
 #endif
@@ -2617,7 +2617,7 @@ void PTextEdit::musrT0()
   // make sure that the system environment variables are properly set
   QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
 #if defined(Q_OS_DARWIN)
-  env.insert("DYLD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:" + env.value("DYLD_LIBRARY_PATH"));
+  env.insert("DYLD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:/usr/local/lib:" + env.value("DYLD_LIBRARY_PATH"));
 #else
   env.insert("LD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:" + env.value("LD_LIBRARY_PATH"));
 #endif
@@ -2662,7 +2662,7 @@ void PTextEdit::musrFT()
     QString cmd = fAdmin->getExecPath() + "/musrFT";
     QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
 #if defined(Q_OS_DARWIN)
-  env.insert("DYLD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:" + env.value("DYLD_LIBRARY_PATH"));
+  env.insert("DYLD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:/usr/local/lib:" + env.value("DYLD_LIBRARY_PATH"));
 #else
   env.insert("LD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:" + env.value("LD_LIBRARY_PATH"));
 #endif
@@ -2785,7 +2785,7 @@ void PTextEdit::musrSetSteps()
   // make sure that the system environment variables are properly set
   QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
 #if defined(Q_OS_DARWIN)
-  env.insert("DYLD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:" + env.value("DYLD_LIBRARY_PATH"));
+  env.insert("DYLD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:/usr/local/lib:" + env.value("DYLD_LIBRARY_PATH"));
 #else
   env.insert("LD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:" + env.value("LD_LIBRARY_PATH"));
 #endif
@@ -2956,7 +2956,7 @@ void PTextEdit::mupp()
   // make sure that the system environment variables are properly set
   QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
 #if defined(Q_OS_DARWIN)
-  env.insert("DYLD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:" + env.value("DYLD_LIBRARY_PATH"));
+  env.insert("DYLD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:/usr/local/lib:" + env.value("DYLD_LIBRARY_PATH"));
 #else
   env.insert("LD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:" + env.value("LD_LIBRARY_PATH"));
 #endif
diff --git a/src/musredit_qt6/musredit/PDumpOutputHandler.cpp b/src/musredit_qt6/musredit/PDumpOutputHandler.cpp
index 88b4827f..5f3b9db7 100644
--- a/src/musredit_qt6/musredit/PDumpOutputHandler.cpp
+++ b/src/musredit_qt6/musredit/PDumpOutputHandler.cpp
@@ -63,7 +63,7 @@ PDumpOutputHandler::PDumpOutputHandler(QVector<QString> &cmd)
   // make sure that the system environment variables are properly set
   QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
 #if defined(Q_OS_DARWIN)
-  env.insert("DYLD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:" + env.value("DYLD_LIBRARY_PATH"));
+  env.insert("DYLD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:/usr/local/lib:" + env.value("DYLD_LIBRARY_PATH"));
 #else
   env.insert("LD_LIBRARY_PATH", env.value("ROOTSYS") + "/lib:" + env.value("LD_LIBRARY_PATH"));
 #endif