Why can't I use the native resolution of my 2021 14-inch Macbook Pro?

Greetings, Carlos.

To start, you’d want to ensure that you are using a Mac that is compatible with your display.

“Compatible Mac models

Pro Display XDR supports a resolution of 6016 x 3384 with 10bpc on these Mac models:

• Mac Studio introduced in 2022
• Mac Pro introduced in 2019
• 16-inch MacBook Pro introduced in 2019 or later
• 15-inch MacBook Pro introduced in 2018 or later
• 14-inch MacBook Pro introduced in 2021
• 13-inch MacBook Pro with Four Thunderbolt 3 ports introduced in 2020
• 13-inch MacBook Pro with Apple M1 chip 
• iMac introduced in 2019 or later
• Mac mini introduced in 2020
• MacBook Air introduced in 2020
• Mac computers with Thunderbolt 3 ports connected to Blackmagic eGPU or Blackmagic eGPU Pro” Set up and use Apple Pro Display XDR 

Then, you can change the resolution. 

“Change the resolution of your display

Your Mac automatically chooses a default resolution that is optimal for your display. To change the resolution:

1. Choose Apple menu  > System Preferences.
2. Click Displays. If you have multiple displays connected, click Display Settings, then select your display.
3. Select Scaled, then select any of the four or five scaled resolutions, depending on your Mac model. With scaled resolutions, text and objects can appear larger and more visible, or smaller to provide more space for windows and apps.” Using a Retina display

We hope this helps! 

Sincerely.

Hello Carlos Echenique,

Welcome to Apple Support Communities. Let's see if this article's information helps:

Using a Retina display

If it doesn't, follow the link at the bottom to reach Apple Support.

Cheers!

Hey Carlos!

You'll want to reach out to Apple Support for assistance with this: Contact Apple for support and service

Regards.