iMac book slow (nearly 3+ minutes)

1) Well, in spite of reputation, your Samsung SSD is putting on a command performance:

Performance:

System Load: 1.78 (1 min ago) 2.03 (5 min ago) 2.53 (15 min ago)

Nominal I/O usage: 2.57 MB/s

File system: 14.52 seconds

Write speed: 2982 MB/s

Read speed: 3161 MB/s

Those read/write scores are a faster than my 2017 iMac with a factory 1TB SSD and no Fusion components. Those scores do not indicate that the drive is the cause of your slow booting.

2) I see AppCleaner. "Cleaning" apps are more likely to cause slow boot issues than an SSD running at 3000 MB/sec. Cleaners interfere with elegant, automated self-maintenance routines you paid Apple to build into macOS. Remove any cleaning apps using the developers' removal instructions.

3) This is a known performance killer:

2023-08-17 09:09:59 photoanalysisd High CPU Use

That is a hungry sub-process of the Photos apps and, fortunately, can be dealt with. Please see this article on the subject:

https://apple.stackexchange.com/questions/310594/what-is-photoanalysisd-and-why-is-it-using-77-of-my-cpu

4) I cannot help thinking that a slow boot could be the computer seeing the old mech drive as the boot partition, although the report appears to show the SSD as the boot volume Still might be worth doing System Prefs > Startup Disk to verify the SSD is boot.

5) This can be mitigated in seconds:

2023-08-17 17:13:19 mdsync High CPU Use (5 times)

Processes starting with "md" are related to Spotlight indexing. You can use Spotlight's system preferences to reduce the types of items that your do not think you need to search, or where an app'ss internal search works just as well, like in Mail:

By default, everything is selected. That can be narrowed down to improve performance.

6) As for reputation:

memory upgraded from 8GB to 24 GB now(add 2 8GB kingston memory)

Kingston has been an issue since Macs went to Intel processors in 2006. Like Corsair, they have two tiers of RAM. The upper tier is usually okay in Macs but the lower tier is historically troublesome. The problem is that, the RAM business being incredibly price-sensitive, resellers tend NOT to stock the more-expensive and Mac-friendly RAM versions of either brand. I use only Crucial or OWC RAM and never and an issue.

See if the boot issue changes if your remove the Kingston modulesand test with only the original factory modules in place.

The log excerpt shows nothing that you don't already know, which is that Mac is taking a long time to boot. The Apple System Log (ASL) statistics entry implies it macOS is taking an extraordinarily long time to do something as it boots and prior to loading the other potentially problematic apps, but exactly what that is cannot be determined from those logs.

Try reinstalling macOS according to How to reinstall macOS - Apple Support. The usual caveats apply, which is to back up your Mac before doing anything.

You must bear in mind one unfortunate fact of Mac life: Apple tests macOS extensively, but only on hardware they incorporate in the products they build, sell, and support. They are not interested in, nor do they evaluate macOS on hardware modified by end users. Plenty of people do that, and that's ok, but they're on their own in that regard.

As I wrote the Samsung "EVO" series SSDs do not enjoy a good reputation among Mac users. That's not to say they don't work for some users on some hardware configurations for some time, but if you want to retrofit your Mac with a third party SSD I strongly suggest you obtain one from a vendor known to exclusively support Macs. The only such vendor I have used and can comfortably recommend is OWC / MacSales. Others may be ok; I just don't happen to have any personal experience with them, whereas OWC's SSDs have continued to work flawlessly for many years past their warranty expiration date. I have no affiliation with them other than to relate that personal experience.

In the meantime consider just letting your Mac sleep according to its Energy Saver settings. There is no need nor any benefit to routinely shutting it down or restating it. Letting it sleep vs. shutting it down will obviate all effects of a long boot time.

One of those apps, Free Download Manager, looks to be a torrent client. Remove that.

Remove the cleaner, as mentioned above. Those can sometimes leave corruptions, too.

I’m curious about the three unreadable app installs, two of which are in range for the slowdown. Maybe a language encoding issue somewhere within the apps or macOS or with EtreCheck? DingTalk seems involved.

Prune the login items, and see if that helps, and if so then adding one at a time to find a culprit. OneDrive, maybe?

• Major issue:

slow boot up(hang at the apple icon and progress bar) and nearly 3+ minutes cost to show the logon window.

None of that Mac's Login Items or other processes subsequent to starting it are a factor during that time. However, you should isolate other potential factors by disconnecting all other connected storage devices.

This slow boot up happened after the disk replacement.

As I wrote.

The Samsung "EVO" series SSDs do not enjoy a good reputation among Mac users. Replace it with one that does.

/private/var/log/system.log

It should be helpful, with the caveat that not everything is logged. Ideally, everything should be logged, but it's up to macOS's programmers to determine what to include.

My experience on our Macs is AppCleaner doesn't interfere with system operations. It doesn't run in background; it runs only when asked.

But, if it interferes with other's systems then the admonition to remove is a good one.