What is VRR, and does it help with movies?

Variable refresh rate (VRR) is a display technology that allows a monitor to synchronize its refresh cycles to the exact moment a graphics processor or video player delivers a new image frame. Instead of updating on a rigid internal clock like standard 60 Hz screens, a VRR-enabled display waits for the next frame, eliminating screen tearing during gaming and pacing judder during film playback.

On Apple computers, this technology appears in two primary forms: built-in ProMotion displays that scale dynamically between 24 Hz and 120 Hz, and system-level support for external VESA Adaptive-Sync and HDMI 2.1 VRR monitors. Understanding how VRR operates helps you configure your display for clear motion, both in games and during 24 fps movie playback.

Animation

24 fps on a 60 Hz screen vs a 120 Hz screen

60 Hz screenframe held 3 refreshes

ABCDEF

120 Hz screen (ProMotion)frame held 3 refreshes

ABCDEF

How does variable refresh rate differ from a fixed refresh rate?

Traditional computer monitors and televisions operate on a fixed hardware oscillator. A standard 60 Hz monitor refreshes its liquid crystal panel exactly 60 times per second—once every 16.67 milliseconds—regardless of what content appears on screen. A 144 Hz gaming monitor updates every 6.94 milliseconds.

When a graphics processing unit (GPU) renders a 3D game, scene complexity fluctuates constantly. Rendering an open field might take 8 milliseconds, while rendering an explosion might take 22 milliseconds. Under a fixed refresh rate, this mismatch creates two major visual flaws:

1. Screen Tearing: If the graphics card sends a newly finished frame while the display is halfway through scanning the previous frame, the monitor draws the top half from the old frame and the bottom half from the new frame. This horizontal tear line breaks visual immersion.
2. V-Sync Stutter: If you enable traditional Vertical Synchronization (V-Sync) to prevent tearing, the graphics card is forced to wait for the next display clock tick. If a frame misses the 16.67 ms deadline by even 0.1 ms, it must wait for the subsequent cycle (33.33 ms), causing an abrupt drop from 60 fps to 30 fps that feels like a momentary hitch.

Variable refresh rate resolves this dilemma by decoupling the screen from its fixed internal clock. With VRR active, the graphics card dictates the refresh schedule. The monitor holds its previous image until the GPU finishes rendering the next frame, then immediately sweeps the new image across the panel. Motion remains fluid, tearing is eradicated, and input latency drops significantly.

What is the difference between VRR, Adaptive-Sync, FreeSync, and ProMotion?

The term “VRR” is an umbrella description, but several competing standards and brand names describe specific protocol implementations across hardware manufacturers:

VESA Adaptive-Sync is the open industry standard built into the DisplayPort 1.2a specification and later revisions. AMD FreeSync is built directly upon the VESA Adaptive-Sync protocol, while HDMI 2.1 VRR is standardized by the HDMI Forum as an official feature of the HDMI 2.1 specification.

Apple ProMotion is Apple’s custom implementation designed specifically for power efficiency and responsiveness on portable devices. While PC gaming monitors focus primarily on maximizing the upper refresh limit (reaching 144 Hz, 240 Hz, or 360 Hz), Apple ProMotion places equal emphasis on the lower boundaries. When reading a static webpage or viewing a PDF document, ProMotion drops the panel refresh rate to conserve battery power. When you scroll or watch video, it accelerates instantly to match the content speed.

Does macOS support VRR on external displays?

Apple Silicon Macs support Variable Refresh Rate on external monitors, but hardware connections dictate compatibility.

According to Apple’s official Adaptive Sync documentation, macOS Monterey 12 or later supports variable refresh rates on all Apple Silicon Mac computers. However, Apple explicitly recommends connecting external VRR displays using Thunderbolt, USB-C, or DisplayPort cables. For dedicated PC monitors, Apple advises against using HDMI cables or adapters, as standard DisplayPort over USB-C provides the cleanest protocol handshake for VESA Adaptive-Sync.

For living room televisions and modern studio monitors, newer Mac models equipped with native HDMI 2.1 ports—including MacBook Pro models with M2 Pro/Max, M3 Pro/Max, M4 family chips, Mac Studio, and Mac Pro—support HDMI 2.1 VRR up to 4K at 240 Hz or 8K at 60 Hz. Legacy Apple Silicon models with HDMI 2.0 ports (such as base M1 and M2 machines) are limited to fixed 4K at 60 Hz over HDMI, meaning VRR on those machines must be routed through a USB-C to DisplayPort cable.

To verify or activate VRR on an external display in macOS:

1. Open System Settings and select Displays.
2. Select your external monitor in the display layout.
3. Click the Refresh Rate drop-down menu.
4. Select Variable (40–144 Hz) or the corresponding adaptive range listed for your display.

If your external monitor supports Adaptive-Sync but the option does not appear in macOS, confirm that FreeSync or Adaptive-Sync is turned on in the monitor’s built-in on-screen display (OSD) hardware menu.

Does VRR help with movies and video playback?

While VRR was originally engineered for 3D video games, it plays an important role in video playback by solving the historic problem of 24 fps judder on 60 Hz screens.

Feature films have been shot and mastered at 24 frames per second since the late 1920s (read about why movies are 24 fps). When a 24 fps movie is played on a conventional fixed 60 Hz computer screen, the arithmetic does not divide evenly:

60 ÷ 24 = 2.5 refreshes per frame

Because a screen cannot draw half a frame, the monitor must alternate between showing one film frame for 3 refreshes (50.0 milliseconds) and the next frame for 2 refreshes (33.33 milliseconds). This uneven 3:2 cadence introduces telecine judder, causing horizontal camera pans to hitch rhythmically across the screen.

On a VRR display or an Apple ProMotion panel, the screen does not have to force an awkward 3:2 compromise. When a media player presents a 24 fps stream, the screen can adapt its refresh rate to an exact integer multiple:

• 48 Hz: Exactly 2 display refreshes per film frame (uniform 2:2 cadence).
• 72 Hz: Exactly 3 display refreshes per film frame (uniform 3:3 cadence).
• 120 Hz: Exactly 5 display refreshes per film frame (uniform 5:5 cadence).

Every single film frame remains on your screen for an identical duration (41.67 milliseconds at 24 fps). The motion pacing matches the smooth, consistent projection of a theatrical cinema projector without requiring artificial motion smoothing.

What is the VRR refresh rate range and why does it matter?

Every variable refresh rate display has physical limitations defined by its panel timing controller (T-CON). This operating span is known as the VRR range.

Most gaming monitors have a VRR range that spans from a lower floor around 40 Hz or 48 Hz up to an upper ceiling of 144 Hz, 165 Hz, or 240 Hz. If a game or video drops below the lower floor—for instance, a 24 fps film running slower than the 40 Hz limit—the display cannot slow its clock down to 24 Hz directly without risking visible panel flicker or voltage decay across the liquid crystal cells.

To bridge this gap, modern displays and graphics drivers implement Low Framerate Compensation (LFC). When incoming video drops below the minimum threshold (such as 24 fps entering a 40–144 Hz monitor), the graphics pipeline automatically doubles or triples the frame presentation rate:

24 fps × 2 = 48 Hz (within the 40–144 Hz range)

24 fps × 5 = 120 Hz (within the 40–144 Hz range)

By multiplying the frame presentation into the active VRR window, the display preserves uniform frame timing without dropping out of variable mode.

On MacBook Pro Liquid Retina XDR displays, Apple engineered the ProMotion panel to step directly down to 24 Hz. When watching a full-screen 24 fps film in QuickTime or native media players, macOS can clock the display down to 24 Hz or 48 Hz, providing authentic film timing while minimizing battery consumption.

Should you use VRR or a fixed cinema refresh rate on Mac?

While leaving ProMotion or VRR enabled is the best general configuration for everyday use, video editors, colorists, and discerning film enthusiasts sometimes choose fixed timing modes.

If you are evaluating 120Hz vs 60Hz displays, you will find that a fixed 120 Hz mode provides the exact same 5:5 cadence for 24 fps movies as a VRR display, because 120 divides cleanly by 24. Furthermore, macOS provides dedicated reference modes on high-end hardware.

As detailed in Apple’s guide on changing Mac refresh rates, users with Liquid Retina XDR displays or the Apple Pro Display XDR can select fixed cinema refresh rates in System Settings:

• 48.00 Hertz: Locks the display to an exact 2:2 multiplier for standard 24.000 fps theatrical cinema files.
• 47.95 Hertz: Locks the display to an exact 2:2 multiplier for fractional 23.976 fps film transfers (2 × 23.976 = 47.952 Hz), preventing the 41-second clock drift frame drops common on rigid 60 Hz displays.
• 50.00 Hertz: Matches European television broadcasts and PAL video files.

If you are watching fractional 23.976 fps movies on an external monitor that exhibits intermittent VRR flicker, manually switching your display to a fixed 47.95 Hz, 48.00 Hz, or 120.00 Hz mode can provide steady timing. For general computing, desktop scrolling, and gaming, leaving ProMotion or Adaptive-Sync enabled ensures the best balance of smoothness and system efficiency. To learn how to select these modes, read our step-by-step tutorial on how to change the refresh rate on a Mac.

If your screen is limited to standard 60 Hz with no VRR capabilities, you can also explore software approaches like motion interpolation to bridge low frame rates cleanly across fixed refresh cycles.

Getting the best motion clarity on Apple Silicon

Variable refresh rate changes how modern screens handle movement. By freeing the display from a rigid clock pulse, VRR allows your Mac to draw frames precisely when they are ready.

For movie lovers on Apple Silicon, this means the end of distracting 3:2 telecine judder. Whether you rely on the built-in 24–120 Hz ProMotion display of a MacBook Pro or connect an external VESA Adaptive-Sync monitor over Thunderbolt, VRR ensures that your movies play with the steady, cinematic cadence their creators intended.