diff --git a/src/CubicSDR.cpp b/src/CubicSDR.cpp
index a28acae..cd6fca3 100644
--- a/src/CubicSDR.cpp
+++ b/src/CubicSDR.cpp
@@ -47,6 +47,7 @@ bool CubicSDR::OnInit() {
 
     AppFrame *appframe = new AppFrame();
 
+#ifdef __APPLE__
     int main_policy;
     struct sched_param main_param;
 
@@ -54,6 +55,7 @@ bool CubicSDR::OnInit() {
     main_param.sched_priority = sched_get_priority_min(SCHED_OTHER);
 
     pthread_setschedparam(pthread_self(), main_policy, &main_param);
+#endif
 
     return true;
 }
diff --git a/src/audio/AudioThread.cpp b/src/audio/AudioThread.cpp
index 3c8814e..7a807c1 100644
--- a/src/audio/AudioThread.cpp
+++ b/src/audio/AudioThread.cpp
@@ -59,8 +59,13 @@ void AudioThread::threadMain() {
     unsigned int sampleRate = AUDIO_FREQUENCY;
     unsigned int bufferFrames = 256;
 
+    RtAudio::StreamOptions opts;
+    opts.flags = RTAUDIO_MINIMIZE_LATENCY | RTAUDIO_SCHEDULE_REALTIME;
+    opts.streamName = "CubicSDR Audio Output";
+    opts.priority = 0;
+
     try {
-        dac.openStream(&parameters, NULL, RTAUDIO_FLOAT32, sampleRate, &bufferFrames, &audioCallback, (void *) this);
+        dac.openStream(&parameters, NULL, RTAUDIO_FLOAT32, sampleRate, &bufferFrames, &audioCallback, (void *) this, &opts);
         dac.startStream();
     } catch (RtAudioError& e) {
         e.printMessage();
diff --git a/src/visual/ScopeContext.cpp b/src/visual/ScopeContext.cpp
index 26368e2..2b1937f 100644
--- a/src/visual/ScopeContext.cpp
+++ b/src/visual/ScopeContext.cpp
@@ -4,8 +4,8 @@
 
 ScopeContext::ScopeContext(ScopeCanvas *canvas, wxGLContext *sharedContext) :
         PrimaryGLContext(canvas, sharedContext) {
-    glEnable(GL_CULL_FACE);
-    glEnable(GL_DEPTH_TEST);
+    glDisable(GL_CULL_FACE);
+    glDisable(GL_DEPTH_TEST);
 
     glMatrixMode(GL_PROJECTION);
     glLoadIdentity();
diff --git a/src/visual/SpectrumContext.cpp b/src/visual/SpectrumContext.cpp
index d90d06c..22f243c 100644
--- a/src/visual/SpectrumContext.cpp
+++ b/src/visual/SpectrumContext.cpp
@@ -4,8 +4,8 @@
 
 SpectrumContext::SpectrumContext(SpectrumCanvas *canvas, wxGLContext *sharedContext) :
         PrimaryGLContext(canvas, sharedContext) {
-    glEnable(GL_CULL_FACE);
-    glEnable(GL_DEPTH_TEST);
+    glDisable(GL_CULL_FACE);
+    glDisable(GL_DEPTH_TEST);
 
     glMatrixMode(GL_PROJECTION);
     glLoadIdentity();
diff --git a/src/visual/WaterfallContext.cpp b/src/visual/WaterfallContext.cpp
index 3d3509d..a20118a 100644
--- a/src/visual/WaterfallContext.cpp
+++ b/src/visual/WaterfallContext.cpp
@@ -4,8 +4,8 @@
 
 WaterfallContext::WaterfallContext(WaterfallCanvas *canvas, wxGLContext *sharedContext) :
         PrimaryGLContext(canvas, sharedContext) {
-    glEnable(GL_CULL_FACE);
-    glEnable(GL_DEPTH_TEST);
+    glDisable(GL_CULL_FACE);
+    glDisable(GL_DEPTH_TEST);
 
     glMatrixMode(GL_PROJECTION);
     glLoadIdentity();