Interesting, I just assumed the base M3 Ultra must have been just two binned M3 Max stitched so it would also carry over the same limits. Turns out there’s more to it.
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New M4 Max Mac Studio - Thunderbolt 5 ports issues - help
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I am having lots of issues with monitors - been using a Studio Display and a LD 32 4K monitor and a Huion Kamvas Pro 24 Pen display I have used these for years connected to a MacPro 2019. I am unable to get all of these working with the Mac Studio M4 Max. I can get both the studio Display and LG displays working fine. Last week with a combination of Huion and LG on HDMI I got all three working. Then I upgraded to 15.4 and the Huion no longer registers in Displays. Still works fine when plugged into a MacBook Pro so its definitely the Mac Studio. Reading this thread makes me wonder if I need a hub as its a power drain issue any thoughts/ I already have 3 storage units connected via am OWC TB Hub as well which works fine.
Today (04/02/2025)I received a different answer from Apple support on this issue. They have recognised an issue, which they believe is software and are now working on a fix. This seemed like progress and should help most issues above as well.
Today (04/02/2025)I received a different answer from Apple support on this issue. They have recognised an issue, which they believe is software and are now working on a fix. This seemed like progress and should help most issues above as well.
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Unbelievable that the Apple monks still did not fix this glaring TB bug in even the latest Mac Studio M variant. They are clearly not producing for Pro's anymore.
The issue with connected displays is a Software issue. Apple has confirmed this and are working on a fix. My Display pen Provider Huoin was really helpful and provided a potential fix, which is to delete plist files relayed to displays. I am waiting for the fix as I don't wish to make the situation worse and the directory structure they described doesn't match the Library structure. please note that all my TB connected devices work fine aside fro, displays
My confidence level in them fixing anything is low to none.
Have you seen the 5k display thread? They have known about this since the M4 release and we still do not have a fix.
Your issue with one monitor not connecting sounds like a possible bandwidth issue. Have you tried using better display to force your other monitors to connect using 8 bit instead of 10bit?
I have tried TWO OWC TB5 hubs to my Mac Studio. Nothing works. And the system report does not show anything connected
glad to read i´m not alone. sorry for you ofcoarse.
i run right now 3 different display threads. figure that
ok, at least this helps to understand that i have to be very cautious and flexibel vs. what i´m doing and that i´m on the right track ( spent so far lots of money allready for cables and hubs and converters etc.)
One would have guessed that the studio operates display flawless, and at least better than the cheap M4mini base. But the contrary is the case. I also have the small mini.....i just swichted
Interesting, I can use both a OWC and a Akitio Pro dock, both TB3 and are powered, to bypass the issue of the Studio not providing enough bus power.
I think OWC has only released one TB5 hub and it is definitely DC powered? I wonder what has changed.
I tried the OWC TB5. Never got it to work with my 2025 Mac Studio. Returned in. Now using the
iVANKY Intel Certified Thunderbolt 5 Dock . Connects everything fine but now having an issue with external drives disconnecting when system goes to sleep. And the setting for powering down disks is set correctly
I have 3 OWC Thunderblade V4 drives all connected to a single OWC TB Hub, and I have had no issues when connecting with a single TB cable from the Hub to my M4 Max Mac Studio.....
So the above uses one of my Studio TB ports, ASD uses another of course, and I have had 2 OWC 1M2 drives connected to the final 2 ports. That's the max I've ever gone, and likely to go at any one time, and its been OK for me........
Bear in mind I always disconnect my drives once I'm done using them for that session - so rarely place my computer to sleep etc with any drives connected......
So the above uses one of my Studio TB ports, ASD uses another of course, and I have had 2 OWC 1M2 drives connected to the final 2 ports. That's the max I've ever gone, and likely to go at any one time, and its been OK for me........
Bear in mind I always disconnect my drives once I'm done using them for that session - so rarely place my computer to sleep etc with any drives connected......
I use the new Acasis Thunderbolt 5 SSD Drive and have problem whene use 2 other Acasis Thunderbolt 4 Drive on my Mac Studio M4 Max. I have 3 Acasis Thunderbolt Drive (TBU405 Air, TB501Pro and TBU405 Pro) and whene use all 3 the Thunderbolt 5 Drive not work. Only whene use 2 Drive its work. Is there any Incompatibility and how can fix it? In all 3 Drive i use KINGSTON Fury SSD with latest Firmware.
All Macs have problems mounting bus powered external SSDs once you reach the 3rd one connected. It is an undocumented, but frequently discovered and discussed limit even on this forum. You may want to search and read up on them as the scenarios and solutions have many variables.
But I can give you a short answer for your scenario: you need to at least move one of the drives to an independently powered source, such as a powered Thunderbolt dock.
You let your computer go to sleep?
/s
While my displays turn themselves off, my Studio itself is always running, but I prefer it, so things like email filters and such continue running.
I only really use an external drive when editing. When I finish I unplug the drive and place the computer to sleep.
I do the same when I just need to check emails or do other stuff - as soon as I finish I close all running programs, and place the computer to sleep before walking away......
You have to ask Apple. If this only happens on MacBooks then we can at least conjecture it have to do with reserving power for the rest of the system, but this happening also on minis and Studios.
Also I should say "all Apple Silicon Macs" that exhibit this issue, because I don't remember anyone reporting this during the TB3 Intel Macs era.
@Chancha re: ‘All Macs have problems mounting bus powered external SSDs once you reach the 3rd one connected.’
“I don't remember anyone reporting this during the TB3 Intel Macs era.”
During the TB3 era everything was certified by Intel, especially power consumption limits.
Bus powered enclosures were the exception, because of Intel’s scrutiny.
PCIe 3 was the fastest available, and larger capacities were extremely rare.
Both put limits on excess power consumption.
And most importantly, desktop Macs had logic board areas more than x4, which allowed power traces on the PCB to be the size that was needed to supply ample power to all sockets.
Compounding the AS miniaturised logic board problem is that, in their desktops, Apple has now fitted tiny trace flexible ribbon cables to connect all their vertical Thunderbolt 4/5 ports…
So the ‘problem’ is what it it is, because Apple does what it does,
And non-Intel TBn enclosure manufacturers do what they do…
“I don't remember anyone reporting this during the TB3 Intel Macs era.”
During the TB3 era everything was certified by Intel, especially power consumption limits.
Bus powered enclosures were the exception, because of Intel’s scrutiny.
PCIe 3 was the fastest available, and larger capacities were extremely rare.
Both put limits on excess power consumption.
And most importantly, desktop Macs had logic board areas more than x4, which allowed power traces on the PCB to be the size that was needed to supply ample power to all sockets.
Compounding the AS miniaturised logic board problem is that, in their desktops, Apple has now fitted tiny trace flexible ribbon cables to connect all their vertical Thunderbolt 4/5 ports…
So the ‘problem’ is what it it is, because Apple does what it does,
And non-Intel TBn enclosure manufacturers do what they do…
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Thank you for the explanation. I was puzzled on why this is happening for years and this makes perfect sense to me now.