Dell U2725QE 4K monitor compatibility with MacBook Pro

That Dell Ultrasharp U2725QE appears to be a 4K display capable of HDR 10 bits color, implemented in the display through an 8 bit panel and FRC dithering. Refresh rates as high as 120 Hz.

interfaces include:

HDMI 2.1

DisplayPort 1.4

Thunderbolt-4, providing up to 140 Watts Power delivery, if desired.

to use with a regular Thunderbolt cable, the cable must be certified, have the Thunderbolt logo, and be no longer than 0.5 meters in length. (Longer ACTIVE Thunderbolt cables are available, but they are more expensive, starting about US$125)

To use on an HDMI cable, DIRECT from the MacBook Pro HDMI port (models After 2022) -- which uses higher Voltages -- a certified ULTRA cable of modest length, typically under ten feet, would be required.

Adequate adapters to HDMI 2.1 are not available.

HDMI cables "shipped in the box" or 'found' behind your TV set are extremely unlikely to be adequate to support top speeds.

Hi,

You need to install firmware, Dell_U2725QE_FWUpdate_M2T102_Mac.pkg for macOS which is available Dell site.