diff --git a/tools/auto-tester/src/PythonInterface.cpp b/tools/auto-tester/src/PythonInterface.cpp
index c5878939cc..9832ac9f8d 100644
--- a/tools/auto-tester/src/PythonInterface.cpp
+++ b/tools/auto-tester/src/PythonInterface.cpp
@@ -14,6 +14,7 @@
 #include <QProcess>
 
 PythonInterface::PythonInterface() {
+#ifdef Q_OS_WIN
     if (QProcessEnvironment::systemEnvironment().contains("PYTHON_PATH")) {
         QString _pythonPath = QProcessEnvironment::systemEnvironment().value("PYTHON_PATH");
         if (!QFile::exists(_pythonPath + "/" + _pythonExe)) {
@@ -27,6 +28,14 @@ PythonInterface::PythonInterface() {
                               "Please set PYTHON_PATH to directory containing the Python executable");
         exit(-1);
     }
+#elif defined Q_OS_MAC
+    _pythonCommand = "/usr/local/bin/python3";
+    if (!QFile::exists(_pythonCommand)) {
+        QMessageBox::critical(0, "PYTHON_PATH not defined",
+                              "python3 not found at " + _pythonCommand);
+        exit(-1);
+    }
+#endif
 }
 
 QString PythonInterface::getPythonCommand() {