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Is one of the displays connected to the HDMI port? Can you connect all 4 to Thunderbolt ports? can you connect the 5Ks to the left side? Can you post the output of the following command:
Code:
ioreg -fiw0 > ioreg_M1_Max_4_displays.txt
This will just get a list of devices. I'll use it to figure out which devices are used for displays. Then I'll update the command to get the info for displays. Or you can change -fiw0 to -fliw0 to get all the info now.
Oh, I already disconnected the Mac from the displays. I use the Mac for on the go so it's not normally connected to my displays. I can try the command later.

I can't connect all the displays to just the thunderbolts since the computer only has 3 thunderbolt ports and I don't have a dock at the moment.

I did connect both 5Ks to the left side and that worked. It even remembered the displays and I did not have to arrange them again.
 
Thanks, I will keep it since these are out of stock everywhere but it sucks that these $1500 displays are made so cheaply. The screen is just so nice that I have no other option right now!
 
Then you come back home again, plug in, to find things all over the place. Going from 'several big screens to small screen and back to several big screens' again, is still a difficult thing to make work without annoyance.

I frequently plug and unplug and this is one of the reasons why I only use one screen (but a bunch of spaces) now.
 
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Potential bug found - When I wake up my computer the 5k display is supposed to be at full brightness but pressing dim - and then + brings it back to its actual full brightness. Does anyone else have this issue?
 
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Potential bug found - When I wake up my computer the 5k display is supposed to be at full brightness but pressing dim - and then + brings it back to its actual full brightness. Does anyone else have this issue?
I have that on one of my monitors sometimes, very annoying!

I thought I was imagining things and noticed it after sleep only.
 
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Yes I have to dim nd then brighten on wake every time. Now I want to get something else. It is impossible to find a display with 500 nits...
 
heh aero yeah this is normal 5k behavior. The other one is the random squiggly line in the middle of the screen that requires a reset.
 
Can anyone comment on how they decided on the LG ultrafine 5k vs say the 4k or an ultrawide monitor?

Don't care about gaming, but trying to decide what to pair a new M1 Max 14"/16" laptop with with main use case for a second monitor to be supporting 2 screens for programming (one code, one browser), side-by-side excel docs, or 2 web browsers.

I'm somewhat debating if I just want to pick up like one large ultrawide to work on w/ clamshell mode on the laptop, or actually run both screens at once and get a smaller 24" 4k display to put to the side.
 
Can anyone comment on how they decided on the LG ultrafine 5k vs say the 4k or an ultrawide monitor?
because https://pixensity.com/list/desktop/ (this list is missing the new LG UltraFine 4K - I guess it would be similar to the Dell P2415Q or Dell UP2414Q)
27 inches is bigger and you get way more pixels

Don't care about gaming, but trying to decide what to pair a new M1 Max 14"/16" laptop with with main use case for a second monitor to be supporting 2 screens for programming (one code, one browser), side-by-side excel docs, or 2 web browsers.

I'm somewhat debating if I just want to pick up like one large ultrawide to work on w/ clamshell mode on the laptop, or actually run both screens at once and get a smaller 24" 4k display to put to the side.
Ultrawides are not HiDPI. The closest would be something like the LG 34WK95U-W (5K2K). 5K1440p is just two QHD displays stuck together.
 
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Right, I'd just be settling for lower dpi/1440p type resolutions but wider. Ya, probably not what I'm looking for then. That LG 95U looks good but for the $$$ I feel like I kind of want to see if Apple just releases a standalone monitor. That's at on of money ($1500ish) for a fairly ugly LG monitor.
 
That LG 95U looks good but for the $$$ I feel like I kind of want to see if Apple just releases a standalone monitor.
There’s also the MSI PS341WU that might be less expensive than the LG.

27 inches is bigger and you get way more pixels
Yep. Additionally, 5K allows running pixel-perfect 2560×1440 HiDPI without the (slight) blurriness and performance drop associated with scaled resolutions. “4K”, if you want pixel-perfect, provides just 1920×1080 HiDPI.
 
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Can anyone comment on how they decided on the LG ultrafine 5k vs say the 4k or an ultrawide monitor?
In very simple terms, 5K gives you Retina equivalent of 1440p whereas 4K gives you Retina equivalent of 1080p.
From the perspective of screen real estate.
I’ve always found 1080p to feel too claustrophobic! I would personally never buy a 4K monitor.
 
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View attachment 1881364I just got my MacBook Pro 16 Max and reading this thread got me curious. My old MacBook Air could only handle one external display. The MacBook Pro 16 max was able to handle 4 displays. One new LG 5k, one old lg 5k, and 2 4K monitors.

The 5K monitors are connected on opposite sides.

I wonder which display it chooses to charge from. Does the Mac figure out which one has the highest charging capacity and go with that one or is it the first one that is connected.

Folks that are lucky enough to be already in possession of the new M1-Max/Pro chips! Can you comment on the efficiency of unified memory? My 16" intel (i7) machine with the AMD 5300M 4GB gfx, struggles to push my dual Ultrafine 5k setup, especially if I'm not using in clamshell mode (and thus also using the 16" built-in!). GPU memory is always full (at 99-100%), fans frequently spinning up etc for very basic workloads.

Is the Unified Memory architecture better at driving these external 5K's? Specifically, I'm wondering if the base 16 GB memory is enough in this scenario or I need 32GB? Rest of my workload is programmer-like, although there's also lots of tabs with complex web apps, business apps (like Outlook), but not a lot of virtual machines.
 
Folks that are lucky enough to be already in possession of the new M1-Max/Pro chips! Can you comment on the efficiency of unified memory? My 16" intel (i7) machine with the AMD 5300M 4GB gfx, struggles to push my dual Ultrafine 5k setup, especially if I'm not using in clamshell mode (and thus also using the 16" built-in!). GPU memory is always full (at 99-100%), fans frequently spinning up etc for very basic workloads.

Is the Unified Memory architecture better at driving these external 5K's? Specifically, I'm wondering if the base 16 GB memory is enough in this scenario or I need 32GB? Rest of my workload is programmer-like, although there's also lots of tabs with complex web apps, business apps (like Outlook), but not a lot of virtual machines.
Standard 16 Max.

I currently have 2 x5k monitors and a 1440p HDMI monitor attached, having my breakfast; 1 monitor is showing the Rogue invitational fullscreen on YouTube in chrome, 1 web browsing and email and the 1440p monitor is idle with VPN and Finder up.

Screenshot 2021-11-01 at 08.25.25.png

I am still yet to hear a fan but again done nothing extensive yet on the computer.
 
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Standard 16 Max.

I currently have 2 x5k monitors and a 1440p HDMI monitor attached, having my breakfast; 1 monitor is showing the Rogue invitational fullscreen on YouTube in chrome, 1 web browsing and email and the 1440p monitor is idle with VPN and Finder up.

View attachment 1899366

I am still yet to hear a fan but again done nothing extensive yet on the computer.
Looks like a good deal of memory is already used up (20GB!) before you’ve opened anything much! So I suppose I better look at that 32GB version myself - maybe spring for more if I plan on any virtualisation…
 
Looks like a good deal of memory is already used up (20GB!) before you’ve opened anything much! So I suppose I better look at that 32GB version myself - maybe spring for more if I plan on any virtualisation…
Screen Shot 2021-11-01 at 7.22.07 AM.png

Here is my base model 14" with the LG 5K in clamshell running a couple days and no memory pressure issues and I have yet to ever hear a fan come on.

I think the more memory you have the more the OS will take advantage of that and use it for caching, so it is expected to see what you do in @scott_donald's screenshot.
 
try not to worry about the memory used its about the pressure. My 8gb M1 air sits basically around 50% hovering between green and yellow. Yes mine uses swap but look how low scott's is...half yours and neither of yours even go above the S haha
 
In very simple terms, 5K gives you Retina equivalent of 1440p whereas 4K gives you Retina equivalent of 1080p.
From the perspective of screen real estate.
I’ve always found 1080p to feel too claustrophobic! I would personally never buy a 4K monitor.
This resonates so much with me. Good summation, and I just can't buy a 4k...but the real estate possible if I settle for ~110dpi constantly draws my attention.
 
I got my LG UltraFine 5k display (27MD5KL) today. Coming from a 2017 iMac, I must say I'm very pleased with the quality of the screen. For my needs, it's sufficiently bright and crisp, and the thinner bezels are a welcome change. Perhaps the most underrated feature however is the height adjustable stand. What a godsend!

So far I haven't experienced any of the documented issues like the screen not waking to set brightness etc. but I don't know if this was just with the older discontinued models.

One thing I'm a bit disappointed with are the built-in speakers. They sound pretty hollow out of the box. I wasn't expecting amazing sound but I read somewhere that they were comparable to the iMac's speakers. They're definitely inferior. Even my 16" MBP sounds better. I probably should have gotten better speakers for the iMac anyway so this will be a nice upgrade.

Overall very happy.
 
I got my LG UltraFine 5k display (27MD5KL) today. Coming from a 2017 iMac, I must say I'm very pleased with the quality of the screen. For my needs, it's sufficiently bright and crisp, and the thinner bezels are a welcome change. Perhaps the most underrated feature however is the height adjustable stand. What a godsend!

So far I haven't experienced any of the documented issues like the screen not waking to set brightness etc. but I don't know if this was just with the older discontinued models.

One thing I'm a bit disappointed with are the built-in speakers. They sound pretty hollow out of the box. I wasn't expecting amazing sound but I read somewhere that they were comparable to the iMac's speakers. They're definitely inferior. Even my 16" MBP sounds better. I probably should have gotten better speakers for the iMac anyway so this will be a nice upgrade.

Overall very happy.
I've had mine for 5 years now, still looking as beautiful as ever. I do agree about the speaker. May I suggest Bose Soundlink Mini 2? It feels perfectly under and sounds much better.
 
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Yes I have to dim nd then brighten on wake every time. Now I want to get something else. It is impossible to find a display with 500 nits...
After a week of use, I've discovered my monitor (model 27MD5KL) does indeed suffer from this same issue. Rather annoying.

I'm also finding the speakers are sounding a bit better....or perhaps I've just climatized to the mediocrity lol. The volume increments are not gradual enough, at least with spotify. In one step, it goes from not loud enough to too loud. Obviously this won't be an issue once I decide which proper speakers to buy.
 
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