diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 0c152ae..37b16f6 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         rust: [stable, nightly]
-        os: [ubuntu-20.04, windows-2019, macos-10.15]
+        os: [ubuntu-20.04, windows-2019, macos-12, macos-14]
         type: [Release, Debug]
 
     steps:
@@ -36,4 +36,7 @@ jobs:
     - name: Test
       shell: bash
       run: rustup run ${{ matrix.rust }} cargo test --all
-      if: matrix.os != 'ubuntu-20.04' # setrlimit64 error in the CI container
+      # ubuntu setrlimit64 error in the CI container, macos not supported
+      if: >
+        matrix.os != 'ubuntu-20.04'
+        && matrix.os != 'macos-12' && matrix.os != 'macos-14'
diff --git a/src/lib.rs b/src/lib.rs
index 6006f79..7ad2e50 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -454,7 +454,7 @@ pub extern "C" fn atp_set_real_time_limit(audio_buffer_frames: u32,
 /// # Arguments
 ///
 /// * `audio_buffer_frames` - the exact or an upper limit on the number of frames that have to be
-/// rendered each callback, or 0 for a sensible default value.
+///    rendered each callback, or 0 for a sensible default value.
 /// * `audio_samplerate_hz` - the sample-rate for this audio stream, in Hz.
 ///
 /// # Return value
@@ -476,7 +476,7 @@ pub fn promote_current_thread_to_real_time(
 /// # Arguments
 ///
 /// * `handle` - An opaque struct returned from a successful call to
-/// `promote_current_thread_to_real_time`.
+///   `promote_current_thread_to_real_time`.
 ///
 /// # Return value
 ///
@@ -496,7 +496,7 @@ pub struct atp_handle(RtPriorityHandle);
 /// # Arguments
 ///
 /// * `audio_buffer_frames` - the exact or an upper limit on the number of frames that have to be
-/// rendered each callback, or 0 for a sensible default value.
+///    rendered each callback, or 0 for a sensible default value.
 /// * `audio_samplerate_hz` - the sample-rate for this audio stream, in Hz.
 ///
 /// # Return value
@@ -524,7 +524,7 @@ pub extern "C" fn atp_promote_current_thread_to_real_time(
 /// # Arguments
 ///
 /// * `atp_handle` - An opaque struct returned from a successful call to
-/// `atp_promote_current_thread_to_real_time`.
+///   `atp_promote_current_thread_to_real_time`.
 ///
 /// # Return value
 ///
@@ -554,7 +554,7 @@ pub unsafe extern "C" fn atp_demote_current_thread_from_real_time(handle: *mut a
 /// # Arguments
 ///
 /// * `atp_handle` - An opaque struct returned from a successful call to
-/// `atp_promote_current_thread_to_real_time`.
+///   `atp_promote_current_thread_to_real_time`.
 ///
 /// # Return value
 ///
diff --git a/src/rt_win.rs b/src/rt_win.rs
index 480c5bd..b76a775 100644
--- a/src/rt_win.rs
+++ b/src/rt_win.rs
@@ -77,6 +77,7 @@ mod avrt_lib {
         Win32::Foundation::{BOOL, FALSE, HANDLE, WIN32_ERROR},
     };
 
+    type WFn = unsafe extern "system" fn() -> HANDLE;
     type AvSetMmThreadCharacteristicsWFn = unsafe extern "system" fn(PCWSTR, *mut u32) -> HANDLE;
     type AvRevertMmThreadCharacteristicsFn = unsafe extern "system" fn(HANDLE) -> BOOL;
 
@@ -94,12 +95,12 @@ mod avrt_lib {
         pub(super) fn try_new() -> Result<Self, WIN32_ERROR> {
             let module = OwnedLibrary::try_new(w!("avrt.dll"))?;
             let av_set_mm_thread_characteristics_w = unsafe {
-                std::mem::transmute::<_, AvSetMmThreadCharacteristicsWFn>(
+                std::mem::transmute::<WFn, AvSetMmThreadCharacteristicsWFn>(
                     module.get_proc(s!("AvSetMmThreadCharacteristicsW"))?,
                 )
             };
             let av_revert_mm_thread_characteristics = unsafe {
-                std::mem::transmute::<_, AvRevertMmThreadCharacteristicsFn>(
+                std::mem::transmute::<WFn, AvRevertMmThreadCharacteristicsFn>(
                     module.get_proc(s!("AvRevertMmThreadCharacteristics"))?,
                 )
             };