diff --git a/.changes/remove-core-display-sys-dep.md b/.changes/remove-core-display-sys-dep.md
new file mode 100644
index 000000000..412512866
--- /dev/null
+++ b/.changes/remove-core-display-sys-dep.md
@@ -0,0 +1,4 @@
+---
+"tao": patch
+---
+Remvoe `core-video-sys` dependency.
diff --git a/Cargo.toml b/Cargo.toml
index 835c1c788..cfdee5480 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -64,11 +64,6 @@ dispatch = "0.2"
 scopeguard = "1.1"
 png = "0.17"
 
-  [target."cfg(target_os = \"macos\")".dependencies.tao-core-video-sys]
-  version = "0.2"
-  default_features = false
-  features = [ "display_link" ]
-
 [target."cfg(target_os = \"macos\")".build-dependencies]
 cc = "1"
 
diff --git a/src/platform_impl/macos/ffi.rs b/src/platform_impl/macos/ffi.rs
index f3cd43328..839ee640e 100644
--- a/src/platform_impl/macos/ffi.rs
+++ b/src/platform_impl/macos/ffi.rs
@@ -10,6 +10,8 @@
   clippy::enum_variant_names
 )]
 
+use std::ffi::c_void;
+
 use cocoa::{
   base::id,
   foundation::{NSInteger, NSUInteger},
@@ -281,3 +283,44 @@ extern "C" {
     unicodeString: *mut UniChar,
   ) -> OSStatus;
 }
+
+mod core_video {
+  use super::*;
+
+  #[link(name = "CoreVideo", kind = "framework")]
+  extern "C" {}
+
+  // CVBase.h
+
+  pub type CVTimeFlags = i32; // int32_t
+  pub const kCVTimeIsIndefinite: CVTimeFlags = 1 << 0;
+
+  #[repr(C)]
+  #[derive(Debug, Clone)]
+  pub struct CVTime {
+    pub time_value: i64, // int64_t
+    pub time_scale: i32, // int32_t
+    pub flags: i32,      // int32_t
+  }
+
+  // CVReturn.h
+
+  pub type CVReturn = i32; // int32_t
+  pub const kCVReturnSuccess: CVReturn = 0;
+
+  // CVDisplayLink.h
+
+  pub type CVDisplayLinkRef = *mut c_void;
+
+  extern "C" {
+    pub fn CVDisplayLinkCreateWithCGDisplay(
+      displayID: CGDirectDisplayID,
+      displayLinkOut: *mut CVDisplayLinkRef,
+    ) -> CVReturn;
+    pub fn CVDisplayLinkGetNominalOutputVideoRefreshPeriod(displayLink: CVDisplayLinkRef)
+      -> CVTime;
+    pub fn CVDisplayLinkRelease(displayLink: CVDisplayLinkRef);
+  }
+}
+
+pub use core_video::*;
diff --git a/src/platform_impl/macos/monitor.rs b/src/platform_impl/macos/monitor.rs
index 2d3c63ec3..55964ae3d 100644
--- a/src/platform_impl/macos/monitor.rs
+++ b/src/platform_impl/macos/monitor.rs
@@ -19,10 +19,6 @@ use core_foundation::{
   string::CFString,
 };
 use core_graphics::display::{CGDirectDisplayID, CGDisplay, CGDisplayBounds};
-use core_video_sys::{
-  kCVReturnSuccess, kCVTimeIsIndefinite, CVDisplayLinkCreateWithCGDisplay,
-  CVDisplayLinkGetNominalOutputVideoRefreshPeriod, CVDisplayLinkRelease,
-};
 
 #[derive(Clone)]
 pub struct VideoMode {
@@ -231,16 +227,16 @@ impl MonitorHandle {
     let cv_refresh_rate = unsafe {
       let mut display_link = std::ptr::null_mut();
       assert_eq!(
-        CVDisplayLinkCreateWithCGDisplay(self.0, &mut display_link),
-        kCVReturnSuccess
+        ffi::CVDisplayLinkCreateWithCGDisplay(self.0, &mut display_link),
+        ffi::kCVReturnSuccess
       );
-      let time = CVDisplayLinkGetNominalOutputVideoRefreshPeriod(display_link);
-      CVDisplayLinkRelease(display_link);
+      let time = ffi::CVDisplayLinkGetNominalOutputVideoRefreshPeriod(display_link);
+      ffi::CVDisplayLinkRelease(display_link);
 
       // This value is indefinite if an invalid display link was specified
-      assert!(time.flags & kCVTimeIsIndefinite == 0);
+      assert!(time.flags & ffi::kCVTimeIsIndefinite == 0);
 
-      time.timeScale as i64 / time.timeValue
+      time.time_scale as i64 / time.time_value
     };
 
     let monitor = self.clone();