diff --git a/CHANGES.md b/CHANGES.md
index 5d3279a80c..d40aa62ff7 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -16,6 +16,7 @@ Bug Fixes
 ---------
 * [#1411](https://github.com/java-native-access/jna/pull/1411): Do not throw `Win32Exception` on success for empty section in `Kernel32Util#getPrivateProfileSection` - [@mkarg](https://github.com/mkarg).
 * [#1414](https://github.com/java-native-access/jna/pull/1414): Fix definition of `c.s.j.p.unix.X11.XK_Shift_R` - [@matthiasblaesing](https://github.com/matthiasblaesing).
+* [#1323](https://github.com/java-native-access/jna/issues/1323). Fix crashes in direct callbacks on mac OS aarch64 - [@matthiasblaesing](https://github.com/matthiasblaesing).
 
 Release 5.10.0
 ==============
diff --git a/appveyor.yml b/appveyor.yml
index 9c70df44d6..5f062ed88b 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -31,7 +31,7 @@ install:
     # Must prepend cygwin PATH to avoid "cygheap base mismatch" from Git\usr\bin\sed
   - cmd: set PATH=C:\cygwin64;C:\cygwin64\bin;%JAVA_HOME%\bin;%PATH%;
   - cmd: choco install -y -f -i %CHOCO_PACKAGES%
-  - cmd: '%CYGWIN_SETUP% --root C:\cygwin64 --local-package-dir C:\cygwin64\packages --quiet-mode --no-desktop --no-startmenu --packages %CYGWIN_PACKAGES%'
+  - cmd: '%CYGWIN_SETUP% --root C:\cygwin64 --local-package-dir C:\cygwin64\packages --quiet-mode --no-desktop --no-startmenu --upgrade-also --packages %CYGWIN_PACKAGES%'
 
 # Setup msvc environment
 for:
diff --git a/contrib/platform/test/com/sun/jna/platform/mac/IOKitTest.java b/contrib/platform/test/com/sun/jna/platform/mac/IOKitTest.java
index 02ac90f9cf..6ab22aa844 100644
--- a/contrib/platform/test/com/sun/jna/platform/mac/IOKitTest.java
+++ b/contrib/platform/test/com/sun/jna/platform/mac/IOKitTest.java
@@ -30,6 +30,7 @@
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
+import static org.junit.Assume.assumeTrue;
 
 import java.util.HashSet;
 import java.util.Set;
@@ -166,8 +167,7 @@ public void testIteratorParentChild() {
 
             // Get device name
             String controllerName = controllerDevice.getName();
-            // Root controllers always begin with "AppleUSB"
-            assertEquals("AppleUSB", controllerName.substring(0, 8));
+            assertNotNull(controllerName);
 
             // Get the first child, to test vs. iterator
             boolean testFirstChild = true;
@@ -177,7 +177,6 @@ public void testIteratorParentChild() {
             IOIterator childIter = controllerDevice.getChildIterator(IO_SERVICE);
             IORegistryEntry childDevice = childIter.next();
             while (childDevice != null) {
-                assertTrue(childDevice.conformsTo("IOUSBDevice"));
                 long childId = childDevice.getRegistryEntryID();
                 assertTrue(childId > 19);
                 assertFalse(uniqueEntryIdSet.contains(childId));
diff --git a/native/callback.c b/native/callback.c
index b127ce41d8..99a9e831a3 100644
--- a/native/callback.c
+++ b/native/callback.c
@@ -288,7 +288,7 @@ create_callback(JNIEnv* env, jobject obj, jobject method,
     case 'D': cb->fptr_offset = OFFSETOF(env, CallDoubleMethod); break;
     default: cb->fptr_offset = OFFSETOF(env, CallObjectMethod); break;
     }
-    status = ffi_prep_cif_var(&cb->java_cif, java_abi, 2, argc+3, java_return_type, cb->java_arg_types);
+    status = ffi_prep_cif_var(&cb->java_cif, java_abi, 3, argc+3, java_return_type, cb->java_arg_types);
     if (!ffi_error(env, "callback setup (2)", status)) {
       ffi_prep_closure_loc(cb->closure, &cb->cif, dispatch_callback, cb,
                            cb->x_closure);