High Refresh Rates on Mac: How to get 144Hz+ on M1, M2, and M3 Chips
Key Takeaway
- Avoid the built-in HDMI port (usually): Unless you have an M2 Pro/Max or newer, the built-in HDMI port on Macs is capped at HDMI 2.0 (4K 60Hz).
- Use Thunderbolt to DisplayPort: The most reliable way to get 144Hz or 240Hz on a Mac is using a high-quality USB-C (Thunderbolt) to DisplayPort 1.4 cable.
- Check your chip's limits: Base M1, M2, and M3 chips have strict external display limits. You can usually only drive one external high-refresh monitor.
- Variable Refresh Rate (VRR) on macOS: Apple supports VRR (FreeSync/G-Sync compatible) over DisplayPort, but you must manually enable it in the Displays settings.
You just bought a beautiful 144Hz gaming monitor to use as an external display for your MacBook Pro. You plug it in using the HDMI cable that came in the box, open your Mac's Display settings, and... the refresh rate dropdown is stuck at 60Hz. This is one of the most common and frustrating experiences for Mac users. Apple Silicon (M1, M2, M3) chips are incredibly capable, but Apple's port configurations and macOS software quirks can make achieving high refresh rates a headache. Let's fix your setup.
The HDMI Bottleneck
The biggest mistake Mac users make is assuming the built-in HDMI port on their laptop or Mac Mini is capable of high refresh rates. For a long time, it wasn't.
If you have an M1 Pro, M1 Max, or any base M1/M2 chip, the physical HDMI port on the machine is an HDMI 2.0 port. As we know from our bandwidth calculations, HDMI 2.0 maxes out at 18 Gbps, which strictly limits you to 4K at 60Hz or 1440p at 144Hz (if you're lucky and the monitor supports the exact timing).
Note: Apple finally upgraded to HDMI 2.1 starting with the M2 Pro and M2 Max chips, allowing 4K 144Hz over HDMI. But if you have an older or base-tier chip, you must abandon HDMI.
The Solution: USB-C to DisplayPort
To bypass the HDMI bottleneck, you need to use the Thunderbolt (USB-C) ports on your Mac. These ports support the "DisplayPort Alternate Mode" protocol, which routes a native DisplayPort 1.4 signal directly from the GPU to the port.
You need to purchase a USB-C to DisplayPort 1.4 cable (or an adapter). Do not buy a USB-C to HDMI cable, as this requires an active conversion chip inside the cable that often introduces input lag or fails to support 144Hz.
Once connected via DisplayPort, macOS will recognize the full bandwidth capabilities of the monitor, and the 144Hz (or even 240Hz) option will magically appear in your Display settings.
Enabling ProMotion and VRR
If you are using a MacBook Pro with a built-in ProMotion (120Hz) display, you are already used to smooth scrolling. But macOS handles external refresh rates differently.
Go to System Settings > Displays. Click on your external monitor. In the "Refresh Rate" dropdown, you will see static options (60Hz, 120Hz, 144Hz) and, if your monitor supports it, an option for Variable (48-144Hz).
Selecting "Variable" enables macOS's implementation of VRR (which is compatible with FreeSync and G-Sync monitors). This is crucial for Mac gaming or video editing, as it allows the monitor to sync its refresh rate to the exact frame rate of your application, eliminating screen tearing and stutter.
Pro-Tip
Frequently Asked Questions
Why can I only connect one external monitor to my M1/M2/M3 Mac?
The base M1, M2, and M3 chips have a hardware limitation that only supports one external display natively. To connect more, you need a DisplayLink adapter, but DisplayLink does not support high refresh rates (it is capped at 60Hz).
Does macOS support 240Hz?
Yes, macOS fully supports 240Hz and even 360Hz, provided you are using a Thunderbolt to DisplayPort 1.4 cable and the resolution bandwidth allows it.
Why is my Mac text blurry on a 1080p 144Hz monitor?
macOS removed subpixel antialiasing a few years ago. It is now optimized exclusively for high-PPI "Retina" displays (4K and 5K). 1080p monitors will always look slightly blurry or jagged on modern macOS.
Can I game at 144Hz on a Mac?
Yes, especially with Apple's Game Porting Toolkit and native titles like Resident Evil or Death Stranding. The M-series GPUs are highly capable of pushing high frame rates.
Does the Mac Mini have the same HDMI limits?
Yes. The base M1/M2 Mac Mini has an HDMI 2.0 port. You must use the Thunderbolt ports for high refresh rates. The M2 Pro Mac Mini, however, has an HDMI 2.1 port.
How do I verify my Mac is actually outputting 144Hz?
macOS animations can sometimes be deceiving. Use our Refresh Rate Test below to confirm the browser and OS are rendering at your target refresh rate.
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