diff --git a/direct/src/dist/FreezeTool.py b/direct/src/dist/FreezeTool.py
index 4390197036..a8d37d07bc 100644
--- a/direct/src/dist/FreezeTool.py
+++ b/direct/src/dist/FreezeTool.py
@@ -211,7 +211,7 @@ class CompilationEnvironment:
                 self.linkDll = 'link /nologo /DLL /MAP:NUL /FIXED:NO /OPT:REF /INCREMENTAL:NO /LIBPATH:"%(PSDK)s\\lib" /LIBPATH:"%(MSVC)s\\lib%(suffix64)s" /LIBPATH:"%(python)s\\libs"  /out:%(basename)s%(dllext)s.pyd %(basename)s.obj'
 
         elif self.platform.startswith('osx_'):
-            # OSX
+            # macOS
             proc = self.platform.split('_', 1)[1]
             if proc == 'i386':
                 self.arch = '-arch i386'
@@ -219,6 +219,8 @@ class CompilationEnvironment:
                 self.arch = '-arch ppc'
             elif proc == 'amd64':
                 self.arch = '-arch x86_64'
+            elif proc in ('arm64', 'aarch64'):
+                self.arch = '-arch arm64'
             self.compileObjExe = "gcc -c %(arch)s -o %(basename)s.o -O2 -I%(pythonIPath)s %(filename)s"
             self.compileObjDll = "gcc -fPIC -c %(arch)s -o %(basename)s.o -O2 -I%(pythonIPath)s %(filename)s"
             self.linkExe = "gcc %(arch)s -o %(basename)s %(basename)s.o -framework Python"
diff --git a/direct/src/gui/OnscreenGeom.py b/direct/src/gui/OnscreenGeom.py
index ac4f93a418..5c5efbbc32 100644
--- a/direct/src/gui/OnscreenGeom.py
+++ b/direct/src/gui/OnscreenGeom.py
@@ -42,8 +42,9 @@ class OnscreenGeom(DirectObject, NodePath):
         """
         # We ARE a node path.  Initially, we're an empty node path.
         NodePath.__init__(self)
-        if parent == None:
-            parent = aspect2d
+        if parent is None:
+            from direct.showbase import ShowBaseGlobal
+            parent = ShowBaseGlobal.aspect2d
 
         self.setGeom(geom, parent = parent, sort = sort, color = color)
 
diff --git a/direct/src/gui/OnscreenImage.py b/direct/src/gui/OnscreenImage.py
index e5a3944178..e6fe258c32 100644
--- a/direct/src/gui/OnscreenImage.py
+++ b/direct/src/gui/OnscreenImage.py
@@ -48,8 +48,9 @@ class OnscreenImage(DirectObject, NodePath):
         # We ARE a node path.  Initially, we're an empty node path.
         NodePath.__init__(self)
 
-        if parent == None:
-            parent = aspect2d
+        if parent is None:
+            from direct.showbase import ShowBaseGlobal
+            parent = ShowBaseGlobal.aspect2d
         self.setImage(image, parent = parent, sort = sort)
 
         # Adjust pose
diff --git a/direct/src/gui/OnscreenText.py b/direct/src/gui/OnscreenText.py
index c26e7033b7..304bb8e800 100644
--- a/direct/src/gui/OnscreenText.py
+++ b/direct/src/gui/OnscreenText.py
@@ -103,8 +103,9 @@ class OnscreenText(NodePath):
           direction: this can be set to 'ltr' or 'rtl' to override the
               direction of the text.
         """
-        if parent == None:
-            parent = aspect2d
+        if parent is None:
+            from direct.showbase import ShowBaseGlobal
+            parent = ShowBaseGlobal.aspect2d
 
         # make a text node
         textNode = TextNode('')
diff --git a/makepanda/makepanda.py b/makepanda/makepanda.py
index 5c7fdcae74..b2a2e92f25 100755
--- a/makepanda/makepanda.py
+++ b/makepanda/makepanda.py
@@ -187,7 +187,7 @@ def parseopts(args):
     anything = 0
     optimize = ""
     target = None
-    target_arch = None
+    target_archs = []
     universal = False
     clean_build = False
     for pkg in PkgListGet():
@@ -214,7 +214,7 @@ def parseopts(args):
             elif (option=="--osxtarget"): OSXTARGET=value.strip()
             elif (option=="--universal"): universal = True
             elif (option=="--target"): target = value.strip()
-            elif (option=="--arch"): target_arch = value.strip()
+            elif (option=="--arch"): target_archs.append(value.strip())
             elif (option=="--nocolor"): DisableColors()
             elif (option=="--version"):
                 match = re.match(r'^\d+\.\d+(\.\d+)+', value)
@@ -273,12 +273,17 @@ def parseopts(args):
     if (optimize==""): optimize = "3"
 
     if OSXTARGET:
+        parts = OSXTARGET.strip().split('.')
         try:
-            maj, min = OSXTARGET.strip().split('.')
-            OSXTARGET = int(maj), int(min)
-            assert OSXTARGET[0] >= 10
+            assert len(parts) <= 2
+            maj = int(parts[0])
+            min = 0
+            if len(parts) > 1:
+                min = int(parts[1])
+            OSXTARGET = maj, min
+            assert OSXTARGET >= (10, 4)
         except:
-            usage("Invalid setting for OSXTARGET")
+            usage("Invalid setting for --osxtarget")
 
         if OSXTARGET < (10, 9):
             warn_prefix = "%sERROR:%s " % (GetColor("red"), GetColor())
@@ -293,11 +298,11 @@ def parseopts(args):
     else:
         OSXTARGET = None
 
-    if target is not None or target_arch is not None:
-        SetTarget(target, target_arch)
+    if target is not None or target_archs:
+        SetTarget(target, target_archs[-1] if target_archs else None)
 
     if universal:
-        if target_arch:
+        if target_archs:
             exit("--universal is incompatible with --arch")
 
         if OSXTARGET:
@@ -311,8 +316,11 @@ def parseopts(args):
         if osxver >= (11, 0):
             OSX_ARCHS.append("arm64")
 
-    elif HasTargetArch():
-        OSX_ARCHS.append(GetTargetArch())
+    elif target_archs:
+        OSX_ARCHS = target_archs
+
+        if 'arm64' in target_archs and OSXTARGET and OSXTARGET < (10, 9):
+            exit("Must have at least --osxtarget 10.9 when targeting arm64")
 
     try:
         SetOptimize(int(optimize))
@@ -412,6 +420,10 @@ elif target == 'darwin':
         if osxver < (10, 9):
             osxver = (10, 9)
 
+        if osxver[0] == 11:
+            # I think Python pins minor version to 0 from macOS 11 onward
+            osxver = (osxver[0], 0)
+
     arch_tag = None
     if not OSX_ARCHS:
         arch_tag = GetTargetArch()
@@ -515,7 +527,7 @@ MakeBuildTree()
 SdkLocateDirectX(STRDXSDKVERSION)
 SdkLocateMaya()
 SdkLocateMax()
-SdkLocateMacOSX(OSXTARGET)
+SdkLocateMacOSX(OSXTARGET, OSX_ARCHS)
 SdkLocatePython(False)
 SdkLocateWindows(WINDOWS_SDK)
 SdkLocateSpeedTree()
@@ -788,6 +800,18 @@ if (COMPILER=="GCC"):
     if GetTarget() != "darwin":
         PkgDisable("COCOA")
 
+    if GetTarget() == 'darwin':
+        if 'x86_64' not in OSX_ARCHS and 'i386' not in OSX_ARCHS:
+            # These support only these archs, so don't build them if we're not
+            # targeting any of the supported archs.
+            PkgDisable("FMODEX")
+            PkgDisable("NVIDIACG")
+        elif (OSX_ARCHS and 'arm64' in OSX_ARCHS) or \
+             (OSXTARGET and OSXTARGET >= (10, 14)) or \
+             (not OSXTARGET and not os.path.isfile('/usr/lib/libstdc++.6.0.9.dylib')):
+            # Also, we can't target FMOD Ex with the 10.14 SDK
+            PkgDisable("FMODEX")
+
     #if (PkgSkip("PYTHON")==0):
     #    IncDirectory("PYTHON", SDK["PYTHON"])
     if (GetHost() == "darwin"):
@@ -1295,6 +1319,8 @@ def CompileCxx(obj,src,opts):
             if OSXTARGET is not None:
                 cmd += " -isysroot " + SDK["MACOSX"]
                 cmd += " -mmacosx-version-min=%d.%d" % (OSXTARGET)
+            elif platform.mac_ver()[0].startswith('11.'):
+                cmd += " -mmacosx-version-min=11.0"
 
             # Use libc++ to enable C++11 features.
             cmd += " -stdlib=libc++"
@@ -1814,6 +1840,8 @@ def CompileLink(dll, obj, opts):
             if OSXTARGET is not None:
                 cmd += " -isysroot " + SDK["MACOSX"] + " -Wl,-syslibroot," + SDK["MACOSX"]
                 cmd += " -mmacosx-version-min=%d.%d" % (OSXTARGET)
+            elif platform.mac_ver()[0].startswith('11.'):
+                cmd += " -mmacosx-version-min=11.0"
 
             # Use libc++ to enable C++11 features.
             cmd += " -stdlib=libc++"
@@ -2479,8 +2507,19 @@ def WriteConfigSettings():
     conf = "/* dtool_config.h.  Generated automatically by makepanda.py */\n"
     for key in sorted(dtool_config.keys()):
         val = OverrideValue(key, dtool_config[key])
-        if (val == 'UNDEF'): conf = conf + "#undef " + key + "\n"
-        else:                conf = conf + "#define " + key + " " + val + "\n"
+
+        if key in ('HAVE_CG', 'HAVE_CGGL', 'HAVE_CGDX9') and val != 'UNDEF':
+            # These are not available for ARM, period.
+            conf = conf + "#ifdef __aarch64__\n"
+            conf = conf + "#undef " + key + "\n"
+            conf = conf + "#else\n"
+            conf = conf + "#define " + key + " " + val + "\n"
+            conf = conf + "#endif\n"
+        elif val == 'UNDEF':
+            conf = conf + "#undef " + key + "\n"
+        else:
+            conf = conf + "#define " + key + " " + val + "\n"
+
     ConditionalWriteFile(GetOutputDir() + '/include/dtool_config.h', conf)
 
     if (PkgSkip("SPEEDTREE")==0):
diff --git a/makepanda/makepandacore.py b/makepanda/makepandacore.py
index 304c88ab3a..4cc7549628 100644
--- a/makepanda/makepandacore.py
+++ b/makepanda/makepandacore.py
@@ -2345,10 +2345,17 @@ def SdkLocateWindows(version=None):
     else:
         print("Using Windows SDK %s" % (version))
 
-def SdkLocateMacOSX(osxtarget = None):
+def SdkLocateMacOSX(osxtarget = None, archs = []):
     if (GetHost() != "darwin"): return
     if (osxtarget != None):
-        sdkname = "MacOSX%d.%d" % osxtarget
+        if osxtarget < (11, 0) and 'arm64' in archs:
+            # Building for arm64 requires the 11.0 SDK, with which we can still
+            # target 10.9.
+            assert osxtarget >= (10, 9)
+            sdkname = "MacOSX11.0"
+        else:
+            sdkname = "MacOSX%d.%d" % osxtarget
+
         if (os.path.exists("/Library/Developer/CommandLineTools/SDKs/%s.sdk" % sdkname)):
             SDK["MACOSX"] = "/Library/Developer/CommandLineTools/SDKs/%s.sdk" % sdkname
         elif (os.path.exists("/Developer/SDKs/%su.sdk" % sdkname)):
@@ -2365,8 +2372,10 @@ def SdkLocateMacOSX(osxtarget = None):
             handle.close()
             if (os.path.exists("%s/Platforms/MacOSX.platform/Developer/SDKs/%s.sdk" % (result, sdkname))):
                 SDK["MACOSX"] = "%s/Platforms/MacOSX.platform/Developer/SDKs/%s.sdk" % (result, sdkname)
+            elif sdkname == "MacOSX11.0" and os.path.exists("/Library/Developer/CommandLineTools/SDKs/MacOSX11.1.sdk"):
+                SDK["MACOSX"] = "/Library/Developer/CommandLineTools/SDKs/MacOSX11.1.sdk"
             else:
-                exit("Couldn't find any MacOSX SDK for OSX version %s!" % sdkname)
+                exit("Couldn't find any MacOSX SDK for macOS version %s!" % sdkname)
     else:
         SDK["MACOSX"] = ""
 
diff --git a/panda/src/device/evdevInputDevice.cxx b/panda/src/device/evdevInputDevice.cxx
index 9407650898..db6285ba19 100644
--- a/panda/src/device/evdevInputDevice.cxx
+++ b/panda/src/device/evdevInputDevice.cxx
@@ -806,23 +806,33 @@ process_events() {
         button_changed(_dpad_up_button, events[i].value < 0);
         button_changed(_dpad_up_button+1, events[i].value > 0);
       }
-      nassertd(code >= 0 && (size_t)code < _axis_indices.size()) break;
-      index = _axis_indices[code];
-      if (index >= 0) {
-        axis_changed(index, events[i].value);
+      if (code >= 0 && (size_t)code < _axis_indices.size()) {
+        index = _axis_indices[code];
+        if (index >= 0) {
+          axis_changed(index, events[i].value);
+        }
+      }
+      else if (device_cat.is_debug()) {
+        device_cat.debug()
+          << "Ignoring EV_ABS event with unknown code " << code << "\n";
       }
       break;
 
     case EV_KEY:
-      nassertd(code >= 0 && (size_t)code < _button_indices.size()) break;
-      index = _button_indices[code];
-      if (index >= 0) {
-        button_changed(index, events[i].value != 0);
+      if (code >= 0 && (size_t)code < _button_indices.size()) {
+        index = _button_indices[code];
+        if (index >= 0) {
+          button_changed(index, events[i].value != 0);
+        }
+        if (code == _ltrigger_code) {
+          axis_changed(_ltrigger_axis, events[i].value);
+        } else if (code == _rtrigger_code) {
+          axis_changed(_ltrigger_axis + 1, events[i].value);
+        }
       }
-      if (code == _ltrigger_code) {
-        axis_changed(_ltrigger_axis, events[i].value);
-      } else if (code == _rtrigger_code) {
-        axis_changed(_ltrigger_axis + 1, events[i].value);
+      else if (device_cat.is_debug()) {
+        device_cat.debug()
+          << "Ignoring EV_KEY event with unknown code " << code << "\n";
       }
       break;
 
diff --git a/panda/src/gobj/geomPrimitive.cxx b/panda/src/gobj/geomPrimitive.cxx
index e55ea41ec8..6529de2f80 100644
--- a/panda/src/gobj/geomPrimitive.cxx
+++ b/panda/src/gobj/geomPrimitive.cxx
@@ -1627,6 +1627,8 @@ calc_tight_bounds(LPoint3 &min_point, LPoint3 &max_point,
 
       for (; i < cdata->_num_vertices; ++i) {
         reader.set_row_unsafe(cdata->_first_vertex + i);
+        nassertv(!reader.is_at_end());
+
         LPoint3 vertex = mat.xform_point_general(reader.get_data3());
 
         min_point.set(min(min_point[0], vertex[0]),
@@ -1653,6 +1655,8 @@ calc_tight_bounds(LPoint3 &min_point, LPoint3 &max_point,
 
       for (; i < cdata->_num_vertices; ++i) {
         reader.set_row_unsafe(cdata->_first_vertex + i);
+        nassertv(!reader.is_at_end());
+
         const LVecBase3 &vertex = reader.get_data3();
 
         min_point.set(min(min_point[0], vertex[0]),
@@ -1696,6 +1700,8 @@ calc_tight_bounds(LPoint3 &min_point, LPoint3 &max_point,
           continue;
         }
         reader.set_row_unsafe(ii);
+        nassertv(!reader.is_at_end());
+
         LPoint3 vertex = mat.xform_point_general(reader.get_data3());
 
         min_point.set(min(min_point[0], vertex[0]),
@@ -1728,6 +1734,8 @@ calc_tight_bounds(LPoint3 &min_point, LPoint3 &max_point,
           continue;
         }
         reader.set_row_unsafe(ii);
+        nassertv(!reader.is_at_end());
+
         const LVecBase3 &vertex = reader.get_data3();
 
         min_point.set(min(min_point[0], vertex[0]),