Change refresh rate of external displays of MacBook Pro m2

Hi PeteHikers,

Let's see if your Mac model supports Adaptive Sync, which might help:

"Some Mac models support Adaptive Sync, a display technology that enables a variable refresh rate that adapts to the frame rate of your content. 

What you need

To use a variable refresh rate on an Adaptive Sync display, you need macOS Monterey or later and one of these Mac models:

• Any Mac with Apple silicon
• Any of these Intel-based Mac models:
  • MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports)
  • MacBook Pro (16-inch, 2019)
  • MacBook Air (Retina, 13-inch, 2020)
  • iMac (Retina 5K, 27-inch, 2020)
  • Mac Pro (2019) when used with any of these Radeon Pro MPX modules: W5500X, W5700X, W6800X, W6900X, or W6800X Duo

For best performance, connect your Adaptive Sync display to the Thunderbolt  port of your Mac using a Thunderbolt, USB-C, or other DisplayPort-enabled cable. Do not use an HDMI cable or adapter.

How to turn Adaptive Sync on or off

macOS Ventura or later:

1. Choose Apple menu  > System Settings, then click Displays.
2. Select your external display at the top of the window.
3. Choose Variable from the Refresh Rate pop-up menu. To stop using Adaptive Sync, choose one of the fixed refresh rates instead.

"

Use an Adaptive Sync external display with your Mac - Apple Support

Need more help, Get Support

Cheers.

Hello PeteHikers,

Refresh rate options only appears if an external display that supports changing the refresh rate is connected to your Mac. Change Displays settings on Mac - Apple Support

Have you checked with the manufacture of the external display to make sure it supports 50 hertz? If not, we recommend working with them for more help: Contact a third-party vendor - Apple Support

Thanks.