Possible to daisy chain 2 Dell U2723QE monitors to my MacBook Pro w/M3 Pro chip?

The Mac doesn't support DIsplayPort MST daisy-chaining.

Even on Windows PCs that support DisplayPort MST, daisy-chaining two 4K monitors from a USB-C (DisplayPort) connection isn't the norm. Dell claims that the "U2723QE is the world’s first 27" 4K monitor which allows daisy chaining of an additional 4K monitor at full resolution via USB-C—enabled by Display Stream Compression (DSC)," meaning that lots of other monitors can't do it.

On the Mac, you need to

• Connect each monitor to a different Mac host port, or
• Connect a Thunderbolt hub/dock to the Mac, then connect both monitors to it

There are a number of Thunderbolt hubs/docks that can drive two non-Thunderbolt monitors at up to 4K @ 60 Hz, provided that the Mac in question supports multiple external displays.

Note: Thunderbolt hub/dock, not just any old USB-C hub/dock. That first link from the Mac to a Thunderbolt dock has more bandwidth than a USB-C (DisplayPort) link – enough to carry two 4K signals side-by-side, or to carry the data required for one 5K or 6K monitor.

dgring wrote:

Thank you! Do you have a recomendation for a particular Thunderbolt hub/dock?

Three vendors that have been in the business of selling Thunderbolt docks to Mac users for many years are:

• Other World Computing – Thunderbolt Docks and Thunderbolt Hub
• CalDigit
• SonnetTech

I've bought some non-Thunderbolt gear from OWC. The others I know only by name (e.g., from having seen some reviews). I don't have any recommendations for particular hubs/docks, but these three places are where I'd look if I was in the market for one today.

Some docks let you connect one monitor via a DisplayPort or HDMI port, and a USB-C (DP) monitor or adapter via their Thunderbolt daisy-chaining port. Other docks or hubs might provide several downstream Thunderbolt ports, and let you hook USB-C(DP) displays or adapters to two of them. Your monitors have USB-C (DP), DP, and HDMI. So I don't think you will have any difficulty finding docks that could work for you. There will probably be more than you can shake a stick at, and the job will be narrowing down the selection to what makes most sense for you.

Note with HDMI v2.0, you might not be able to have all of

• 4K resolution
• 10-bit-per-channel color (not crucial, but your monitor supports it)
• 60 Hz refresh rate
• 4:4:4 RGB representation (each pixel has its own color)

at the same time. This might be a reason to prefer a USB-C (DP) or DisplayPort connection.