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Having said that, any given machine will slow over time with the same OS on it, just through usage. This is much improved in these days of journalling and SSDs, but a well-used install is *always* slower than a fresh one, on the same hardware. The only way around that is to have a machine so over-powered that you can't slow it down...
I see no difference 7 years later on my 2015 MacBook Pro running OS X El Capitan.
 
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Having said that, any given machine will slow over time with the same OS on it, just through usage. This is much improved in these days of journalling and SSDs, but a well-used install is *always* slower than a fresh one, on the same hardware. The only way around that is to have a machine so over-powered that you can't slow it down...

Heck, I've been using the same install since 2007 and it hasn't slowed down. I always run Time Machine migration whenever I get a new machine and haven't had a need to do a "fresh install" since I bought my first mac.
 
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Practically speaking, I concur… but just for the sake of the argument, why would does this happen?
Space is used, more tasks may be routinely happening, software updates to apps and OS use more resources. If, however, nothing changes, then slowdown ought not to occur.
Heck, I've been using the same install since 2007 and it hasn't slowed down. I always run Time Machine migration whenever I get a new machine and haven't had a need to do a "fresh install" since I bought my first mac.
I did say, 'on the same hardware'. Your install hasn't slowed because your hardware power has increased. If you took your install and put it back on that original machine, probably a different story.
 
They were just making them more annoying because of all the baggage that comes with Intel processors in the way of thermal management.
Because they were designed with the Windows PC market in mind, where there is far less issue with thermal problems, in desktops at least. Where Apple did similar with the Cheesegrater, cooling was well catered for. But good cooling often goes alongside some noise, and in general, Apple seems to favour silence over good thermal management.
 
I did say, 'on the same hardware'. Your install hasn't slowed because your hardware power has increased. If you took your install and put it back on that original machine, probably a different story.
by implication "on the same hardware" I always use the same install, and it hasn't slowed down.
 
Launching Disk Utility on Big Sur/Monterey at installation time is very slow compared to launching Disk Utility on Catalina at installation time and older... This is on a 2015 15" MacBook Pro intel core i7 with 16 GB DDR3 RAM...
 
Practically speaking, I concur… but just for the sake of the argument, why would does this happen?
This slow-down doesn't really happen on Linux unless you try, and it hardly happens on macOS unless you install loads of stuff that adds startup items, pretends to be a system optimization utility, or is otherwise crappy.
 
It's not being disrespectful. Some people can see the flicker of fluorescent lights, I can't. I used to be able to hear a 16 KHz tone, but not any more. Some people get seasick. I did once, when I was already sick with some Aussie bug from Perth. The rest of the time I was fine. People are not identical.

I doubt I can see the difference at 120 Hz refresh either, but I haven't had the chance to try.
Back when I was in the workstation business at DEC we had a huge debate about changing our large (at the time) monitors from 60 Hz to something faster. The Human Factors team did studies on this very topic.

Now, this was ~40 years ago, but I doubt the human animal and its visual system has changed much. The results were that about 1/3 of the people saw 60 hz flicker and that dropped off fast. at 66hz less than 1% of those tested saw the flicker and when it was pushed up to 72Hz it was less than 0.1%.

However, at the time the cost of doing 72Hz on those "high resolution" (1600x1200) displays was pretty high so we settled on 66hz as a compromise between cost and the ability for people to see.

Somehow I doubt that any significant portion of the population can see refresh at 120hz. But it does make for a good marketing claim, after all we all know that bigger is better right?
 
My evidence is my programming knowledge and my experience with Apple devices. My MacBook Air 2018 got significantly slower version by version. I hear complaints even from i9 owners. And it's been a decline even before Apple Silicon was a thing.
I would expect "evidence" to include some measurements (and the resulting numbers) you took that are well enough explained that others could replicate your results.

The reason for perceived changes is that today we expect our computers to do more. The "slow down" is relative to expectations and it is the expectations that change over time.

Of course, I could be proved wrong, if you have some numbers to point to.
 
I would expect "evidence" to include some measurements (and the resulting numbers) you took that are well enough explained that others could replicate your results.

The reason for perceived changes is that today we expect our computers to do more. The "slow down" is relative to expectations and it is the expectations that change over time.

Of course, I could be proved wrong, if you have some numbers to point to.
I don't need numbers to decide whether something is laggy or not. It's either instant enough or it's not. No new Apple computer ever lags while it's new.
 
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I find the absolute dismissal of this concern by so many to be pretty telling. If there is an issue, that would likely be why it has continued. The type of customers apple wants are the ones that would never even entertain such a thought. Jut the number of issues that arise from each update is worrying enough, I can understand with PC considering there is almost infinite configurations, but due to apple's serialization and proprietary disposition, the possible configurations are EXTREMELY limited, so why so many issues?

I digress, though. I have never had a brand new Apple product except for the iPad I got my daughter for her drawing. I have however worked on many and used them for work and had many given to me "broken" or because they are "too old"(aka 3 years old). I have noticed considerable issues with performance after "upgrading" MacOS. I first noticed it about 8 years ago or so with a 2013 13" Macbook Pro. It was only a year old when I got it from work. it worked just fine for a while. I never added any software to it and all of the stuff I used for work was cloud based via a browser. However after a couple years, it started becoming more and more useless as updates were applied and especially after going to a new OS version. Nothing changed with the programs or use cases, but things started taking 5x as long to open after clicking, etc. I upgraded the RAM to the max capacity at the time (only 8GB) at the fastest mhz it could handle. I also spent WAY too much for a Mac compatible SSD. Still, ZERO improvement! I actually stopped using it and went to using an old Acer I got in like 2010(w/ Windows 7 installed I believe) for $300 running the newest version of Windows 10 at the time, instead and it was lightning fast in comparison using the same programs. I finally broke that Macbook back out in like 2018 to see what I could use it for, but it would not work at all really. It would boot up and get to desktop eventually, but EVERYTHING I tried to do would time out...or rather just "spin". I even put the stock hardware back in and it was the same. I did a fresh install of the OS on both the SSD and the old stock HDD, installed nothing extra whatsoever, and it was still the same, completely unusable. SO, I installed the newest version of Ubuntu on it and the thing was lighting fast! Faster than it ever was even when it was only like 2 years old. I could even run multiple Windows VMs without any noticeable slowdown.

One thing may be that I was not using it as often and those changes are done so incrementally that some people don't notice it as much/at all? Maybe the hardware is just junky, we did have a 4' stack of dead Macbook Airs, and a nearly 5' stack of dead MacBook Pros in the IT department of that company(why they let me keep mine). I'm running into the same issues on much newer Macbooks and MacMinis I was gifted a while back too. I cant say for sure why this is happening, if it is intentional, or what exactly is the trigger, but there is something going on, so for all those that say there is 100% nothing going on, you may wanna check you bias's. Cognitive dissonance is a b!#ch, I have been there before. Its amazing what your brain can do to save you from accepting something you really don't want to. Large expensive purchases have a way of triggering that sort of subconscious justification, been there too.

At this point I have clearly given up on avoiding digression and have moved into to borderline ranting, but having worked on computer hardware for nearly 30 years, I find the existence of "booby traps" inside their devices, doing things like geocoding parts to the location of the technicians they sell them to, so they can only be activated there (if GPS is accurate at the time that is), and making a mobo/CPU/RAM/SSD+ all one "assembly", pretty large red flags that they would be willing to do other shady stuff like the aforementioned possibilities. Think about it, their desired customer base are fiercely loyal, adverse to repairing their own hardware, well off financially, and willing to buy a new device every 1-3 years. How much push back from people like that do you think; slowing performance a little bit each update over a couple years to make the new device seem like a better upgrade, would get them? Sure people like myself who are not their desired customer may point it out, but anyone fitting the description of their preferred customer would almost never listen or just consider it tribalism/hyperbole if they did. Jimmy Kimble recently did a funny bit where they had Apple users "try the new iPhone" with their own data on it via a "special program that lets them transfer all their data to the new phone instantly"(fyi, if anyone ever says they can do that, don't give them your phone...no matter who they say they are,ok?). However all they did was distract them with questions while some fake technician behind them, wiped down their old phone really well and put it in a new case. EVERY single one of them raved about how much better it was compared to the last one. Including a guy that worked for Apple! It's part of that old, "why would it cost so much if it wasn't good?!" fallacy. MANY people will just assume it is and pay it, because $$$=GOOD, whether it is a product or a person, right? Just like how "we" tell people that hard work, honesty, and talent = "success" their whole lives, while we hold up people who achieved that kind of "success" as role models, and apply those virtues to them for doing so, even though that in most cases they reached that level of "success" via the absolute antithesis of those very virtues "we" claim to hold so dear. Ya'll buy Yeti coolers and Tesla cyber"truck"s too?! I would say it's a safe bet that is the case. Then again who would the coffee shop staff laugh at without those kind of people? They need those good laughs to get theough the day, so I guess it is providing some worthwile value. :-D
 
I find the absolute dismissal of this concern by so many to be pretty telling. ....
A 20 billion word rant with NO SUPPORTING DATA.... You are going to need extensive measurements if you want people to listen to you. Otherwise, we call it "hand waving".

Note that I am not disagreeing with you. You might be right but you are not proving it so the argument is less then weak.

Try doing common tasks while measuring with some kind of timer. For example, making edits and saving a Pages document or counting the number of words on a very large document or rendering a video in FCP.

Then of course there is the other way around. Do something with the new version of the OS and then see how long it would have taken using the old version. Like maybe removing a foreground object from a photo. Many times you might find the older version simply can not do the task at all. It this a "slow-down" or an infinite speed-up?

In any case with no data, no one listens or cares.
 
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Welcome to the forums, @Case Runner. This appeared to be your first message, and it sounds like you have a lot of complaints you want to voice.

Would you like to discuss some these points individually? A lot could be said about each, but it depends on how interested you are in talking rather than just airing grievances.

There are certainly many Apple apologists here, but there are also a lot of knowledgeable folks. If you want to talk about the tech details and try to find solutions or clarify the issues by providing some specific cases and maybe offer some data points we can look at, that could give us more to constructively talk about, like @ChrisA mentioned.
 
I can’t recall any of my devices slowing down after an OS update.
You've never experienced slower performance, more spinning beach balls and the like after any OS update? Do you mean major updates, or just point releases? How many years have you been using Apple devices?
 
I don't need numbers to decide whether something is laggy or not. It's either instant enough or it's not. No new Apple computer ever lags while it's new.
You've kind of proven the point that @ChrisA made. You believe that your Mac must perform "instant enough" according to your subjective measurements.
 
You've never experienced slower performance, more spinning beach balls and the like after any OS update? Do you mean major updates, or just point releases? How many years have you been using Apple devices?
I’ve been using Apple since 2001. And, no, in all that time I have never noticed any slowing down after any OS upgrades in any of my Macs or Apple devices.

My longest serving device, my 2011 21.5 iMac I used for thirteen years, experienced some slow down due to an aging HDD, but I replaced it with a Samsung Evo SSD and solved that issue. That with a couple of other tweaks and that machine ran sweet and better than new for another five years…until my sister inadvertently allowed Got Junk to take it away to the trash last week… A painful story I don’t like to think about—almost akin to a beloved pet put down for no reason. Somehow I managed to keep my head and not lose it totally—understanding she didn’t do it deliberately and it happened while she was dealing with a lot happening at once. But it stings nonetheless.
 
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