diff --git a/src/changelog/unreleased.md b/src/changelog/unreleased.md
index 341a6480..63d9856d 100644
--- a/src/changelog/unreleased.md
+++ b/src/changelog/unreleased.md
@@ -254,3 +254,4 @@ changelog entry.
 - On Wayland, fixed a crash when consequently calling `set_cursor_grab` without pointer focus.
 - On Wayland, ensure that external event loop is woken-up when using pump_events and integrating via `FD`.
 - On Wayland, apply fractional scaling to custom cursors.
+- On macOS, fixed `VideoMode::refresh_rate_millihertz` for fractional refresh rates.
diff --git a/src/platform_impl/apple/appkit/monitor.rs b/src/platform_impl/apple/appkit/monitor.rs
index de33e62a..830771fe 100644
--- a/src/platform_impl/apple/appkit/monitor.rs
+++ b/src/platform_impl/apple/appkit/monitor.rs
@@ -126,13 +126,12 @@ impl MonitorHandle {
         let modes = unsafe { CFRetained::cast_unchecked::<CFArray<CGDisplayMode>>(array) };
 
         modes.into_iter().map(move |mode| {
-            let cg_refresh_rate_hertz =
-                unsafe { CGDisplayMode::refresh_rate(Some(&mode)) }.round() as i64;
+            let cg_refresh_rate_hertz = unsafe { CGDisplayMode::refresh_rate(Some(&mode)) };
 
             // CGDisplayModeGetRefreshRate returns 0.0 for any display that
             // isn't a CRT
-            let refresh_rate_millihertz = if cg_refresh_rate_hertz > 0 {
-                NonZeroU32::new((cg_refresh_rate_hertz * 1000) as u32)
+            let refresh_rate_millihertz = if cg_refresh_rate_hertz > 0.0 {
+                NonZeroU32::new((cg_refresh_rate_hertz * 1000.0).round() as u32)
             } else {
                 refresh_rate_millihertz
             };