diff --git a/interface/CMakeLists.txt b/interface/CMakeLists.txt
index 4bcd7aaf0f..bcd3f269e8 100644
--- a/interface/CMakeLists.txt
+++ b/interface/CMakeLists.txt
@@ -70,12 +70,16 @@ file(GLOB_RECURSE INTERFACE_SRCS "src/*.cpp" "src/*.h")
 GroupSources("src")
 list(APPEND INTERFACE_SRCS ${RESOURCES_RCC})
 
+# grab the Objective-C sources on OS X
+if (APPLE)
+  file(GLOB_RECURSE INTERFACE_OBJCPP_SRCS "src/*.m" "src/*.mm")
+  list(APPEND INTERFACE_SRCS ${INTERFACE_OBJCPP_SRCS})
+endif ()
+
 # Add SpeechRecognizer if on Windows or OS X, otherwise remove
 if (WIN32)
   # Use .cpp and .h files as is.
 elseif (APPLE)
-  file(GLOB INTERFACE_OBJCPP_SRCS "src/SpeechRecognizer.mm")
-  set(INTERFACE_SRCS ${INTERFACE_SRCS} ${INTERFACE_OBJCPP_SRCS})
   get_filename_component(SPEECHRECOGNIZER_CPP "src/SpeechRecognizer.cpp" ABSOLUTE)
   list(REMOVE_ITEM INTERFACE_SRCS ${SPEECHRECOGNIZER_CPP})
 else ()
diff --git a/interface/src/AppNapDisabler.h b/interface/src/AppNapDisabler.h
new file mode 100644
index 0000000000..b3cfc3038d
--- /dev/null
+++ b/interface/src/AppNapDisabler.h
@@ -0,0 +1,24 @@
+//
+//  AppNapDisabler.h
+//  interface/src
+//
+//  Copyright 2019 High Fidelity, Inc.
+//
+//  Distributed under the Apache License, Version 2.0.
+//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
+//
+
+#ifndef hifi_AppNapDisabler_h
+#define hifi_AppNapDisabler_h
+
+#import <objc/objc-runtime.h>
+
+class AppNapDisabler {
+public:
+    AppNapDisabler();
+    ~AppNapDisabler();
+private:
+    id _activity;
+};
+
+#endif // hifi_AppNapDisabler_h
diff --git a/interface/src/AppNapDisabler.mm b/interface/src/AppNapDisabler.mm
new file mode 100644
index 0000000000..0c760fad5f
--- /dev/null
+++ b/interface/src/AppNapDisabler.mm
@@ -0,0 +1,28 @@
+//
+//  AppNapDisabler.mm
+//  interface/src
+//
+//  Copyright 2019 High Fidelity, Inc.
+//
+//  Distributed under the Apache License, Version 2.0.
+//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
+//
+
+#include <QtGlobal>
+#ifdef Q_OS_MAC
+
+#include "AppNapDisabler.h"
+
+#import <AppKit/AppKit.h>
+
+AppNapDisabler::AppNapDisabler() {
+    _activity = [[NSProcessInfo processInfo] beginActivityWithOptions:NSActivityUserInitiated reason:@"Audio is in use"];
+    [_activity retain];
+}
+
+AppNapDisabler::~AppNapDisabler() {
+    [[NSProcessInfo processInfo] endActivity:_activity];
+    [_activity release];
+}
+
+#endif // Q_OS_MAC
diff --git a/interface/src/Application.cpp b/interface/src/Application.cpp
index 4002cca0c1..b4a37519a6 100644
--- a/interface/src/Application.cpp
+++ b/interface/src/Application.cpp
@@ -265,6 +265,12 @@ extern "C" {
 #include "AndroidHelper.h"
 #endif
 
+#if defined(Q_OS_MAC)
+// On Mac OS, disable App Nap to prevent audio glitches while running in the background
+#include "AppNapDisabler.h"
+static AppNapDisabler appNapDisabler;   // disabled, while in scope
+#endif
+
 #include "graphics/RenderEventHandler.h"
 
 Q_LOGGING_CATEGORY(trace_app_input_mouse, "trace.app.input.mouse")