diff --git a/Makefile b/Makefile
index d21f816aa..aeeb51e75 100644
--- a/Makefile
+++ b/Makefile
@@ -821,16 +821,6 @@ endif
 else # LINUX
 	@echo "VST:     $(ANS_YES)(without UI) $(mZ)Linux, Mac and Windows only$(mE)"
 endif
-endif
-ifeq ($(MACOS_OR_WIN32),true)
-	@echo "VST3:    $(ANS_YES)"
-else
-	@echo "VST3:    $(ANS_NO) $(mZ)Windows and MacOS only$(mE)"
-endif
-ifeq ($(MACOS),true)
-	@echo "AU:      $(ANS_YES)"
-else
-	@echo "AU:      $(ANS_NO) $(mZ)MacOS only$(mE)"
 endif
 	@echo ""
 
diff --git a/data/carla-single b/data/carla-single
index 4dba198b6..1abeaa062 100755
--- a/data/carla-single
+++ b/data/carla-single
@@ -49,7 +49,6 @@ Possible formats:
   - dssi
   - lv2
   - vst|vst2
-  - vst3
   - gig
   - sf2
   - sfz
@@ -96,14 +95,12 @@ if len(sys.argv) == arg:
 # --------------------------------------------------------------------------------------------------------
 # Set format
 
-if sys.argv[arg] in ("internal", "ladspa", "dssi", "lv2", "vst", "vst2", "vst3", "au", "audiounit", "gig", "sf2", "sfz"):
+if sys.argv[arg] in ("internal", "ladspa", "dssi", "lv2", "vst", "vst2", "gig", "sf2", "sfz"):
     FORMAT = sys.argv[arg]
     arg += 1
 
     if FORMAT == "vst":
         FORMAT = "vst2"
-    elif FORMAT == "audiounit":
-        FORMAT = "au"
 
 elif len(sys.argv) == arg+1:
     FORMAT = "lv2" if ":" in sys.argv[arg] else "internal"
@@ -189,7 +186,7 @@ if ARCH not in ("native", "posix32", "posix64", "win32", "win64"):
     print("Invalid arch")
     sys.exit(1)
 
-if FORMAT not in ("internal", "ladspa", "dssi", "lv2", "vst2", "vst3", "gig", "sf2", "sfz"):
+if FORMAT not in ("internal", "ladspa", "dssi", "lv2", "vst2", "gig", "sf2", "sfz"):
     print("Invalid format")
     sys.exit(1)
 
@@ -208,8 +205,6 @@ LADSPA_PATH = os.getenv("LADSPA_PATH")
 DSSI_PATH   = os.getenv("DSSI_PATH")
 LV2_PATH    = os.getenv("LV2_PATH")
 VST2_PATH   = os.getenv("VST_PATH")
-VST3_PATH   = os.getenv("VST3_PATH")
-AU_PATH     = os.getenv("AU_PATH")
 GIG_PATH    = os.getenv("GIG_PATH")
 SF2_PATH    = os.getenv("SF2_PATH")
 SFZ_PATH    = os.getenv("SFZ_PATH")
@@ -218,8 +213,6 @@ if LADSPA_PATH is not None: os.environ["ENGINE_OPTION_PLUGIN_PATH_LADSPA"] = LAD
 if DSSI_PATH   is not None: os.environ["ENGINE_OPTION_PLUGIN_PATH_DSSI"]   = DSSI_PATH
 if LV2_PATH    is not None: os.environ["ENGINE_OPTION_PLUGIN_PATH_LV2"]    = LV2_PATH
 if VST2_PATH   is not None: os.environ["ENGINE_OPTION_PLUGIN_PATH_VST2"]   = VST2_PATH
-if VST3_PATH   is not None: os.environ["ENGINE_OPTION_PLUGIN_PATH_VST3"]   = VST3_PATH
-if AU_PATH     is not None: os.environ["ENGINE_OPTION_PLUGIN_PATH_AU"]     = AU_PATH
 if GIG_PATH    is not None: os.environ["ENGINE_OPTION_PLUGIN_PATH_GIG"]    = GIG_PATH
 if SF2_PATH    is not None: os.environ["ENGINE_OPTION_PLUGIN_PATH_SF2"]    = SF2_PATH
 if SFZ_PATH    is not None: os.environ["ENGINE_OPTION_PLUGIN_PATH_SFZ"]    = SFZ_PATH