iMac 2020 not shutting down

PRP_53 wrote:

I have been quietly following this thread since the Get Go back on Jan 30, 2024

@Luis S could not be more correct in suggesting to use  Etrecheck

It will avoid a session of Q&A, Q&A  and Q&A  and drill down to the possible culprit that could be the cause of this issue

This is a Diagnostic Tool that makes no changes to the computer.

It makes a coherent and readable inventory of both the Hardware and Software used on the computer 

Appreciate your "seconding the motion" regarding Etrecheck. If, as it seems, this utility software is reliable and accurate, then I will definitely add this to my arsenal of utilities. The "good news" is, it seems no serious problems with my iMac were found. The "bad........or questionable news" is, why have I experienced so many piddle problems with this 2020 iMac which I never experienced over the past 28 years with any other Apple computer that I have owned. My guess is one word; "SONOMA". I still have and frequently use, a Mid 2015 iMac running El Capitan with never any problems (except, of course), the fact that all the installed software is considered "vintage" and no longer supported.

Luis Sequeira1 wrote:

Something may be preventing shutdown.

Try starting in Safe Mode. Does it shutdown from Safe Mode? (I fully expect the answer to be yes).

Then start normally once again. Is the problem resolved? If not: Please run Etrecheck and post its full report here.

Use the "additional text" button and paste the report into the text box.

Held Shift key immediately after selecting Resart. Computer restarted ok but did not boot up in Safe mode. Tried twice but will not boot up into Safe Mode. Have no idea what Etecheck is. I'm a graphic artist - not a "techie". Is Etrecheck an internal Mac thing or some third party software? BTW- I never received any notification that someone replied to my original post. Found out you had posted only after checking the link I saved on my computer???

SergeantMac wrote:

Luis Sequeira1 wrote:

Safe mode only works from a full shutdown, not s restart.

Etrecheck is a diagnostic utility by a respected member this community. It produces a report so we can know useful information about your system like ram, disk free space and what third party software modifications are installed - these are often the cause of problems. It does not include any private information, as you can check for yourself before posting it here.

Yes, I found out that Safe mode only works from full shutdown (regardless what Apple Discussions indicates). From what I have read about Etrecheck it only runs only a low level diagnosis but I will check further. I have been using Onyx for years. Basically Onyx does the same thing.........but who is qualified enough to properly analyze these system reports. As I say not all of us are computer technicians.

Is this any help in diagnosing a potential problem within my system?

** Checking the container superblock.

Checking the checkpoint with transaction ID 1104597.

** Checking the EFI jumpstart record.

** Checking the space manager.

** Checking the space manager free queue trees.

** Checking the object map.

** Checking the encryption key structures.

** Checking volume /dev/rdisk1s4.

** Checking the APFS volume superblock.

The volume iMac 2020 HD was formatted by storagekitd (2236.101.1) and last modified by apfs_kext (2236.141.1).

** Checking the object map.

** Checking the snapshot metadata tree.

** Checking the snapshot metadata.

** Checking the fsroot tree.

** Checking the file extent tree.

** Checking the extent ref tree.

** Verifying volume object map space.

** Verifying allocated space.

** The volume /dev/rdisk1s4 with UUID F956EA98-FBBB-43F5-B5A0-FB50E2DBA1A2 appears to be OK.

** Checking the container superblock.

Checking the checkpoint with transaction ID 1104598.

** Checking the EFI jumpstart record.

** Checking the space manager.

** Checking the space manager free queue trees.

** Checking the object map.

** Checking the encryption key structures.

** Checking volume /dev/rdisk1s1.

** Checking the APFS volume superblock.

The volume Macintosh HD - Data was formatted by storagekitd (2236.101.1) and last modified by apfs_kext (2236.141.1).

** Checking the object map.

** Checking the snapshot metadata tree.

** Checking the snapshot metadata.

** Checking the document ID tree.

** Checking the fsroot tree.

warning: inode (id 7790056): Resource Fork xattr is missing for compressed file

warning: inode (id 8125738): Resource Fork xattr is missing for compressed file

warning: inode (id 8469837): Resource Fork xattr is missing for compressed file

warning: inode (id 8517501): Resource Fork xattr is missing for compressed file

warning: inode (id 8517957): Resource Fork xattr is missing for compressed file

warning: inode (id 8699351): Resource Fork xattr is missing for compressed file

warning: inode (id 8784716): Resource Fork xattr is missing for compressed file

warning: inode (id 8784961): Resource Fork xattr is missing for compressed file

warning: inode (id 8939386): Resource Fork xattr is missing for compressed file

warning: inode (id 9095184): Resource Fork xattr is missing for compressed file

warning: inode (id 9452320): Resource Fork xattr is missing for compressed file

warning: inode (id 9452637): Resource Fork xattr is missing for compressed file

warning: inode (id 9635366): Resource Fork xattr is missing for compressed file

warning: inode (id 9635415): Resource Fork xattr is missing for compressed file

warning: inode (id 9845587): Resource Fork xattr is missing for compressed file

warning: inode (id 10385315): Resource Fork xattr is missing for compressed file

warning: inode (id 11293699): Resource Fork xattr is missing for compressed file

warning: inode (id 11294710): Resource Fork xattr is missing for compressed file

warning: inode (id 11296368): Resource Fork xattr is missing for compressed file

warning: inode (id 11296726): Resource Fork xattr is missing for compressed file

warning: inode (id 11731600): Resource Fork xattr is missing for compressed file

** Checking the extent ref tree.

** Verifying volume object map space.

** The volume /dev/rdisk1s1 with UUID 438A07CB-6158-4B9B-B37D-A5255D946041 was found to be corrupt and needs to be repaired.

** Verifying allocated space.

** Performing deferred repairs.

** The volume /dev/rdisk1s1 with UUID 438A07CB-6158-4B9B-B37D-A5255D946041 appears to be OK.

Here is the Etrecheck report you suggested. Do you see anything in this report that appears to be a "fixable" problem? It appears to me that Etrecheck did not find a problem. Frankly I tend to think the "problem" is OS Sonoma. Sonoma is, in my 28+ years of using Apple/Mac products, the most obfuscated, overly complicated operating system I have ever used. Thank you for your help and recommendation.

PRP_53 wrote:

I might say, there is something Off here

Mind you, I am coming from 3 machines that are Apple Silicon machines so the drive structure on Intel maybe different

https://eclecticlight.co/2021/12/16/boot-disk-layout-in-macos-monterey/

As for Sonoma itself - no issues and any of the Current M2, M3, machines nor on a Retired M1 machine traded in for the M4 which came with Sequoia

disk1s4 (APFS) [APFS Container] (11.00 GB used)

          disk1s4s1 - i**********D (APFS) [APFS Snapshot] (11.00 GB used)

disk1s4 [APFS Container]

    Filesystem: APFS

    Mount point: /System/Volumes/Update/mnt1

    Encrypted

    Used: 11.00 GB

    Shared values

      Size: 1.00 TB

      Free: 820.83 GB

      Available: 824.03 GB

Not sure if you are referring to the Etrecheck report on my iMac or my comments when you say "something's off". If defending OS Sonoma, yes, it may "run" smoother on a silicon processor but even at that, it's a convoluted, obfuscated operating system. If we had time & opportunity, I could tell you about all kinds of piddly problems and bugs in Sonoma (that even an Apple Senior Tech Rep confirmed as being "screwy" and overly complicated) with Sonoma. I seriously doubt that macOS Sequoia would rectify the ongoing problems (#1 - runs slow) I and others have experienced using Intel & Sonoma. My Mid 2015 iMac under El Capitan runs much faster (and smoother) than this 2020 iMac.

I certainly don't want to push my computer's components into a bigger mess by updating to OS Sequoia. Yes, I know Apple says the framework of my computer (iMac 5K 27-inch 2020 with a 3.6 GHz 10-Core Intel Core i9 processor, a AMD Radeon Pro 5700 XT 16 GB graphics card and 64GB of RAM) is fully compatible to run on OS Sonoma..............but "run how well" is the question! Plus, I don't like the structure and interface of Sonoma.

Sorry to have written so much my friend. I guess I get on a roll........... So what are you saying appears "off" - my iMac or me - lol?

Luis Sequeira1 wrote:

Safe mode only works from a full shutdown, not s restart.

Etrecheck is a diagnostic utility by a respected member this community. It produces a report so we can know useful information about your system like ram, disk free space and what third party software modifications are installed - these are often the cause of problems. It does not include any private information, as you can check for yourself before posting it here.

Yes, I found out that Safe mode only works from full shutdown (regardless what Apple Discussions indicates). From what I have read about Etrecheck it only runs only a low level diagnosis but I will check further. I have been using Onyx for years. Basically Onyx does the same thing.........but who is qualified enough to properly analyze these system reports. As I say not all of us are computer technicians.