MacBook Pro M4 with thunderbolt 5 and portable monitor

I just bought the new M4 pro with thunderbolt 5, but looks like it doesn't work with any portable monitors. I tried 3 of them using only one cable for both power and signal #portable. It only works if you power up the monitor then the power pass through it and then it can charge the laptop too.

Anyone experienced the same issue or if you have a similar setup can you check to see if is not just me? I also went to the Apple Store to check with a range of M* macs and looks like the only one with this issue is the M4pro w/ tb 5 (tested using both thunderbolt 4&5 cables)

I called the support but they just pass me around for 1h until they hang up eventually without saying goodbye :).

Just want to know if this is software fixable or a hardware issue as I do use this nomad setup quite often.

Thanks.

MacBook Pro 14″

Posted on Nov 14, 2024 07:35 AM

Top-ranking reply

ToddGeorgeKelly

Level 1

48 points

Posted on Nov 19, 2024 11:54 AM

I already had that hub, I have 15 different thunderbolt cables of varying lengths, I have about 12 USB-C cables, capable of delivering display signals, also varying lengths, I have tested every single one of them and nothing works, and the one factor involved that seems to make the difference is that it is a thunderbolt five port.

every single one of my cables works with thunderbolt four on the M4 Mac mini. But again, as has been said, not a single of my 27 cables works when using the thunderbolt five ports on the M4 Pro Mac mini.

Thanks for your armchair input, but I think I will stick with hard results from my actual tests.

Though I cannot conclusively say that it is SPECIFICALLY because of thunderbolt five, I think we can all agree that something about the thunderbolt five models of the M4 Macs seem to have an issue connect connecting to portable displays and delivering signal.

Could this be a software issue? Maybe. maybe it’s a firmware thing that just needs an update. Could it be something else? Sure. But as of right now, based on every piece of evidence presented, it seems like Macs with thunderbolt five are not able to deliver a display signal along with the power to a portable display without that hub I am using or a similar one as the in between.

I get that in a perfect world, based on how things should be working in theory with thunderbolt five as you have explained in your other comments, it “shouldn’t” be an issue. But, here we are. 🤷‍♂️

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MacBook Pro M4 with thunderbolt 5 and portable monitor

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