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  1. #16
    Just an update: I thought that by running the system via an external SSD connected with a SATA to USB 3.0 cable adapter would do the trick for me. I ordered the cable and today I used Carbon Copy to copy my HD to the SSD. I did some quick speed test with the external SSD using Blackmagic Disk Speed Test and it was giving me around 450 MB/s on writing and reading. I changed my startup disk in System Settings to the SSD and rebooted. The system now is even worse running through the external SSD. I only had Chrome opened with 21 tabs when I restarted the system. The system started and it took 14 minutes just to stop the beachballing while loading Chrome. That was the only application opened. I tried to open Safari while Chrome was loading and it took five minutes for it to load. Apps in background and tabs on Chrome gets unresponsive all the time (when I right-click an app in the dock I see 'Application Not Responding').

    That's bad news for me because I was putting all my hope in a bad HD. The problem seems to be deeper than that and I have no idea what to check or where to start.

  2. #17
    Quote Originally Posted by Ratsima View Post
    I have the same machine but with an Apple SSD and have never seen that sort of performance degradation. It would be nice if you would show us a screenshot of Activity Monitor sorted by CPU, or run this in a terminal session and give us a screenshot. (Wait a few seconds for it to sort.)
    Code:
    /usr/bin/top -ocpu -F -s 2 -n30

    Thanks for the tips, Ratsima! Here are some screenshots from activity monitor and terminal.

  3. #18
    I'm running EtreCheck right now. I'm not sure if the system is running through the external SSD. I'll google how to check that. If anyone knows please give me a tip! The only test I did was to take some screenshots and check where the files were saved. They are being saved to the internal HD of the iMac and not to the SSD.

  4. #19
    The slowest 2017 iMac on Earth - How to diagnose which is the issue?
    ferrarr's Avatar
    Member Since
    May 21, 2012
    Location
    Pawtucket, RI, US
    Posts
    7,103
    Your Mac's Specs
    L2014 Mac mini macOS 15, iPhone 8+ iOS 13, 12.9" iPad Pro 1 iPadOS 13,  Pencil 1
    Rep Power
    14
    Have you tried to start up in safe mode?

    Use safe mode to isolate issues with your Mac - Apple Support

    To see which drive is the startup drive, go into System Preferences, and select Startup Disk. It will show you which disk/drive you are running off. You can also use that access panel to switch to a different startup disk option.
    -- Bob --
    Please backup. Everything has a life cycle, unexpected and warning free. Nothing will last as long as you want it to.

  5. #20
    40 minutes more or less after restarting the system and only now it seems to be more or less stabilised. However I had to close all my tabs on Chrome and I'm running only Chrome with three tabs opened at the moment. It was running like that:


  6. #21
    EtreCheck report
    EtreCheck version: 6.1.5 (6B036)
    Report generated: 2019-12-07 18:17:13
    Download EtreCheck from EtreCheck
    Runtime: 9:16
    Performance: Below Average

    Problem: Computer is too slow

    Major Issues:
    Anything that appears on this list needs immediate attention.
    No Time Machine backup - Time Machine backup not found.
    Unsigned files - There are unsigned software files installed that could be adware and should be reviewed.
    Gatekeeper disabled - Gatekeeper security protection is disabled. This computer is at risk of malware infection.
    No antivirus software - This computer does not have any antivirus software. It is at risk of malware infection.

    Minor Issues:
    These issues do not need immediate attention but they may indicate future problems or opportunities for improvement.
    Heavy RAM usage - Apps are using a large amount of RAM.
    Apps crashing - There have been numerous app crashes.
    Clean up - There are orphan files that could be removed.
    Low performance - EtreCheck report took an unusually long time to run.
    Limited drive access - More information may be available with Full Drive Access.

    Hardware Information:
    iMac (Retina 4K, 21.5-inch, 2017)
    iMac Model: iMac18,2
    1 3 GHz Quad-Core Intel Core i5 (i5-7400) CPU: 4-core
    8 RAM - Upgradeable by an Apple Authorized Service Provider
    BANK 0/DIMM0 - 4 GB DDR4 SO-DIMM 2400
    BANK 1/DIMM0 - 4 GB DDR4 SO-DIMM 2400

    Video Information:
    Radeon Pro 555 - VRAM: 2 GB
    iMac 4096 x 2304

    Drives:
    disk0 - APPLE HDD HTS541010A9E632 1.00 TB (Mechanical - 5400 RPM)
    Internal SATA 3 Gigabit Serial ATA
    disk0s1 - EFI (MS-DOS FAT32) [EFI] 210 MB
    disk0s2 [APFS Container] 1000.00 GB
    disk1 [APFS Virtual drive] 1000.00 GB (Shared by 5 volumes)
    disk1s1 - M******************s (APFS) [APFS Virtual drive] (Shared - 46.01 GB used)
    disk1s2 - Preboot (APFS) [APFS Preboot] (Shared - 108 MB used)
    disk1s3 - Recovery (APFS) [Recovery] (Shared - 529 MB used)
    disk1s4 - VM (APFS) [APFS VM] (Shared - 5.37 GB used)
    disk1s5 - Macintosh HD (APFS) (Shared - 10.72 GB used)

    disk2 - JMicron Generic 500.11 GB
    External USB 480 Mbit/s USB
    disk2s1 - EFI (MS-DOS FAT32) [EFI] 210 MB
    disk2s2 [APFS Container] 499.76 GB
    disk3 [APFS Virtual drive] 499.76 GB (Shared by 4 volumes)
    disk3s1 - C************* Data (APFS) (Shared - 54.33 GB used)
    disk3s2 - C***********0 (APFS) (Shared - 10.75 GB used)
    disk3s3 - Preboot (APFS) [APFS Preboot] (Shared - 79 MB used)
    disk3s4 - Recovery (APFS) [Recovery] (Shared - 534 MB used)

    Mounted Volumes:
    disk1s1 - M******************s [APFS Virtual drive]
    1000.00 GB (Shared - 46.01 GB used, 943.97 GB available, 937.06 GB free)
    APFS
    Mount point: /System/Volumes/Data

    disk1s4 - VM [APFS VM]
    1000.00 GB (Shared - 5.37 GB used, 937.06 GB free)
    APFS
    Mount point: /private/var/vm

    disk1s5 - Macintosh HD
    1000.00 GB (Shared - 10.72 GB used, 943.97 GB available, 937.06 GB free)
    APFS
    Mount point: /
    Read-only: Yes

    disk3s1 - C************* Data
    499.76 GB (Shared - 54.33 GB used, 433.94 GB available, 433.91 GB free)
    APFS
    Mount point: /Volumes/C************* Data
    Owners enabled: No

    disk3s2 - C***********0
    499.76 GB (Shared - 10.75 GB used, 433.94 GB available, 433.91 GB free)
    APFS
    Mount point: /Volumes/C***********0
    Owners enabled: No

    disk4s2 - E**************************d
    37 MB (25 MB used, 12 MB free)
    Mac OS Extended
    Disk Image
    Mount point: /Volumes/E**************************d
    Read-only: Yes

    Network:
    Interface en0: Ethernet
    Interface en1: Wi-Fi

    Interface en5: iPhone
    Interface en4: Bluetooth PAN
    Interface bridge0: Thunderbolt Bridge
    iCloud Quota: 0 B available
    iCloud Status: 3 pending files

    System Software:
    macOS Catalina 10.15.1 (19B88)
    Time since boot: About an hour

    Notifications:
    /Applications/Folx.app
    3 notifications

    (Deleted)
    one notification

    /Applications/Deezer.app
    one notification

    /Applications/Carbon Copy Cloner.app/Contents/Library/LoginItems/CCC User Agent.app
    one notification

    /Applications/Path Finder.app
    97 notifications

    /Applications/HandBrake.app
    12 notifications

    Security:
    System Status
    Gatekeeper: Anywhere
    System Integrity Protection: Enabled

    Antivirus software: None!

    Unsigned Files:
    Launchd: /Library/LaunchDaemons/com.cocoatech.PathFinder.SMFHelper7.plist
    Executable: /Library/PrivilegedHelperTools/com.cocoatech.PathFinder.SMFHelper7

    Launchd: ~/Library/LaunchAgents/com.DigiDNA.iMazing2Mac.Mini.plist
    Executable: /Applications/iMazing.app/Contents/MacOS/iMazing Mini.app/Contents/MacOS/iMazing Mini

    Launchd: /Library/LaunchDaemons/com.intel.haxm.plist
    Executable: /Library/Extensions/intelhaxm.kext/Contents/Resources/haxm_start.sh
    Details: Exact match found in the whitelist - probably OK

    Launchd: /Library/LaunchDaemons/com.bombich.ccchelper.plist
    Executable: /Library/PrivilegedHelperTools/com.bombich.ccchelper
    Details: Exact match found in the whitelist - probably OK

    Login Item: /Applications/Carbon Copy Cloner.app/Contents/Library/LoginItems/CCC User Agent.app
    Login Item: /Applications/Path Finder 2.app/Contents/Library/LoginItems/PathFinderLauncher.app
    Login Item: /Applications/Boom 2.app/Contents/Library/LoginItems/Boom2Daemon.app

    Kernel Extensions:
    /Library/Application Support/Logitech.localized/Logitech Options.localized
    [Not Loaded] LogiMgrDriver.kext (8.02.1 - SDK 10.13)

    /Library/Extensions
    [Loaded] Boom2Device.kext (1.2 - SDK 10.12)
    [Not Loaded] intelhaxm.kext (7.5.1 - SDK 10.9)
    [Loaded] MovaviSoundGrabber2.kext (2.0.1)

    System Launch Agents:
    [Not Loaded] 17 Apple tasks
    [Loaded] 177 Apple tasks
    [Running] 116 Apple tasks

    System Launch Daemons:
    [Not Loaded] 35 Apple tasks
    [Loaded] 189 Apple tasks
    [Running] 110 Apple tasks
    [Other] 2 Apple tasks

    Launch Agents:
    [Running] com.logitech.manager.daemon.plist (Logitech Inc. - installed 2019-10-04)
    [Other] com.paloaltonetworks.gp.pangpa.plist (? e325755d - installed 2019-11-21)
    [Other] com.paloaltonetworks.gp.pangps.plist (? ce949a03 - installed 2019-11-21)

    Launch Daemons:
    [Running] com.bjango.istatmenus.daemon.plist (Bjango Pty Ltd - installed 2019-12-05)
    [Running] com.bjango.istatmenus.fans.plist (Bjango Pty Ltd - installed 2019-12-05)
    [Loaded] com.bjango.istatmenus.installerhelper.plist (Bjango Pty Ltd - installed 2019-12-05)
    [Loaded] com.bombich.ccchelper.plist (? bc948f55 - installed 2019-12-07)
    [Loaded] com.cocoatech.PathFinder.SMFHelper7.plist (? bb4d243a - installed 2019-12-07)
    [Loaded] com.intel.haxm.plist (? 42f307e7 - installed 2019-05-27)
    [Other] com.paloaltonetworks.gp.pangpsd.plist (? fcd5eb13 - installed 2019-11-21)

    User Launch Agents:
    [Loaded] com.DigiDNA.iMazing2Mac.Mini.plist (? 0 - installed 2019-11-27)
    [Running] com.bjango.istatmenus.agent.plist (Bjango Pty Ltd - installed 2019-12-05)
    [Running] com.bjango.istatmenus.status.plist (Bjango Pty Ltd - installed 2019-12-05)
    [Other] com.epicgames.launcher.plist (? 0 - installed 2019-11-30)
    [Loaded] com.google.keystone.agent.plist (Google, Inc. - installed 2019-12-03)
    [Loaded] com.google.keystone.xpcservice.plist (Google, Inc. - installed 2019-12-03)

    User Login Items:
    [Not Loaded] AppCleaner SmartDelete (Julien Ramseier - installed 2018-11-18)
    Modern Login Item
    /Applications/AppCleaner.app/Contents/Library/LoginItems/AppCleaner SmartDelete.app

    [Running] Boom2Daemon (? - installed 2018-11-08)
    Modern Login Item
    /Applications/Boom 2.app/Contents/Library/LoginItems/Boom2Daemon.app

    [Not Loaded] CCC User Agent (? - installed 2019-11-20)
    Modern Login Item
    /Applications/Carbon Copy Cloner.app/Contents/Library/LoginItems/CCC User Agent.app

    [Not Loaded] Folx Schedule Helper (ELTIMA LLC - installed 2019-11-25)
    Modern Login Item
    /Applications/Folx.app/Contents/Library/LoginItems/FolxScheduleHelper.app

    [Not Loaded] Movavi Screen Recorder 10 (Movavi Software Inc - installed 2019-11-19)
    Modern Login Item
    /Applications/Movavi Screen Recorder 10.app/Contents/Library/LoginItems/Movavi Screen Recorder 10.app

    [Not Loaded] PathFinderLauncher (? - installed 2019-11-12)
    Modern Login Item
    /Applications/Path Finder 2.app/Contents/Library/LoginItems/PathFinderLauncher.app

    [Loaded] Skitch Helper (App Store - installed 2019-11-20)
    Modern Login Item
    /Applications/Skitch.app/Contents/Library/LoginItems/J8RPQ294UB.com.skitch.SkitchHelper.app

    [Loaded] StartUpHelper (Spotify - installed 2019-12-06)
    Modern Login Item
    /Applications/Spotify.app/Contents/Library/LoginItems/StartUpHelper.app

    [Not Loaded] Translate Tab-Launcher (App Store - installed 2019-11-13)
    Modern Login Item
    /Applications/Translate Tab.app/Contents/Library/LoginItems/Translate Tab-Launcher.app

    [Running] Android File Transfer Agent (Google, Inc. - installed 2018-10-17)
    Application
    ~/Library/Application Support/Google/Android File Transfer/Android File Transfer Agent.app

    Safari Extensions:
    Folx - ELTIMA LLC (installed 2019-11-25)

    Time Machine:
    Time Machine Not Configured!

    Performance:
    System Load: 2.37 (1 min ago) 2.25 (5 min ago) 2.20 (15 min ago)
    Nominal I/O speed: 5.99 MB/s
    File system: 33.14 seconds
    Write speed: 70 MB/s
    Read speed: 74 MB/s

    CPU Usage Snapshot:
    Type Overall
    System 11 %
    User 21 %
    Idle 68 %

    Top Processes Snapshot by CPU:
    Process (count) CPU (Source - Location)
    Google Chrome Helper (Renderer) (20) 24.84 % (Google, Inc.)
    WindowServer 22.18 % (Apple)
    Google Chrome Helper (GPU) 21.00 % (Google, Inc.)
    EtreCheckPro 6.86 % (? - /Applications/EtreCheckPro.app)
    Google Chrome 6.36 % (Google, Inc.)

    Top Processes Snapshot by Memory:
    Process (count) RAM usage (Source - Location)
    Google Chrome Helper (Renderer) (20) 2.24 GB (Google, Inc.)
    EtreCheckPro 504 MB (? - /Applications/EtreCheckPro.app)
    Google Chrome 222 MB (Google, Inc.)
    mds_stores 137 MB (Apple)
    Google Chrome Helper (GPU) 116 MB (Google, Inc.)

    Top Processes Snapshot by Network Use:
    Process (count) Input / Output (Source - Location)
    mDNSResponder 1 MB / 347 KB (Apple)
    netbiosd 24 KB / 558 B (Apple)
    apsd 6 KB / 9 KB (Apple)
    rapportd 2 KB / 553 B (Apple)
    SystemUIServer 0 B / 40 B (Apple)

    Top Processes Snapshot by Energy Use:
    Process (count) Energy (0-100) (Source - Location)
    Google Chrome Helper (Renderer) (20) 6 (Google, Inc.)
    WindowServer 6 (Apple)
    mds_stores 3 (Apple)
    System Information 2 (Apple)
    Google Chrome Helper (GPU) 2 (Google, Inc.)

    Virtual Memory Information:
    Physical RAM: 8 GB

    Free RAM: 57 MB
    Used RAM: 5.96 GB
    Cached files: 1.99 GB

    Available RAM: 2.04 GB
    Swap Used: 3 MB

    Software Installs (past 30 days):
    Install Date Name (Version)
    2019-11-19 Gatekeeper Configuration Data (181)
    2019-11-19 XProtectPlistConfigData (2108)
    2019-11-19 Movavi Screen Recorder 10 (10.4.0)
    2019-11-20 Skitch (2.8.4)
    2019-11-21 GlobalProtect (0)
    2019-11-26 Movavi Video Editor 15 (15.2.0)
    2019-11-29 Movavi Sound Grabber (1.0)
    2019-11-30 The Unarchiver (4.1.0)
    2019-12-03 Logitech Options (8.02)
    2019-12-07 Disk Speed Test (3.2)
    2019-12-07 EtreCheck (5.4.6)

    Clean up:
    /Library/LaunchAgents/com.paloaltonetworks.gp.pangpa.plist
    /Applications/GlobalProtect.app/Contents/MacOS/GlobalProtect
    Executable not found
    /Library/LaunchDaemons/com.paloaltonetworks.gp.pangpsd.plist
    /Applications/GlobalProtect.app/Contents/Resources/PanGPS
    Executable not found
    /Library/LaunchAgents/com.paloaltonetworks.gp.pangps.plist
    /Applications/GlobalProtect.app/Contents/Resources/PanGPS
    Executable not found
    ~/Library/LaunchAgents/com.epicgames.launcher.plist
    '/Applications/Epic Games Launcher.app'
    Executable not found


    Diagnostics Information (past 7 days):
    2019-12-07 11:49:11 GlobalProtect.app Crash
    Executable: /Applications/GlobalProtect.app

    2019-12-06 16:15:18 WindowServer Crash
    Executable: /System/Library/PrivateFrameworks/SkyLight.framework/Versions/A/Resources/WindowServer

    2019-12-05 19:27:41 Path Finder.app High CPU Use
    Executable: /Applications/Path Finder.app

    2019-12-05 17:17:04 logd Crash
    Executable: /usr/libexec/logd
    Details:
    dyld3 mode
    BUG IN LIBTRACE: Bad timesync db entry, file rotated

    2019-12-05 12:54:15 MTLCompilerService Crash
    Executable: /System/Library/Frameworks/Metal.framework/Versions/A/XPCServices/MTLCompilerService.xpc/Contents/MacOS/MTLCompilerService
    Details:
    dyld3 mode
    abort() called

    2019-12-05 12:42:16 DiskImageMounter.app High CPU Use
    Executable: /System/Library/CoreServices/DiskImageMounter.app

    2019-12-01 00:54:22 HotlineMiami2.app High CPU Use
    Executable: /Applications/HotlineMiami2.app


    End of report

  7. #22
    The slowest 2017 iMac on Earth - How to diagnose which is the issue?
    pm-r's Avatar
    Member Since
    Oct 16, 2010
    Location
    Brentwood Bay, BC, Canada
    Posts
    12,528
    Rep Power
    20
    I'm not sure if the system is running through the external SSD. I'll google how to check that. If anyone knows please give me a tip!

    When booted and running, select your "About This Mac" under the Apple logo in the menu, and it should say what the name of the boot disk is under the "Startup disk" info.



    - Patrick
    ======

  8. #23
    Quote Originally Posted by hamnickel View Post
    Just an update: I thought that by running the system via an external SSD connected with a SATA to USB 3.0 cable adapter would do the trick for me. I ordered the cable and today I used Carbon Copy to copy my HD to the SSD. I did some quick speed test with the external SSD using Blackmagic Disk Speed Test and it was giving me around 450 MB/s on writing and reading. I changed my startup disk in System Settings to the SSD and rebooted. The system now is even worse running through the external SSD. [...]
    Shame on me! The first I tried to reboot with the SSD the computer didn't reboot (it turned off instead). I turned it on and thought it was booting from the SSD since I selected it as the startup disk on System Preferences. I tried again and the system actually restarted this time. Now I'm really running from the external SSD -- thanks @ferrarr and @pm-r

    As far as I tested it seems like a new computer. The problem was almost definitely the mechanical HD inside it. Thanks everyone for all the help and tips you gave me!
    I hope to open this guy and update it with an internal SSD and 2x8GB of RAM.

  9. #24
    The slowest 2017 iMac on Earth - How to diagnose which is the issue?
    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Keller, Texas
    Posts
    59,361
    Your Mac's Specs
    2017 27" iMac, 10.5" iPad Pro, iPhone 7+, iPhone 8, Numerous iPods, Catalina
    Rep Power
    54
    @hamnickel:

    Replacing the hard drive with an SSD may not be as easy as you think with that model iMac. Be sure to check with iFixit: The Free Repair Manual for instructions. I suspect that you're going to need an adapter and possibly a bracket plus cable for the replacement SSD. (Unless there is already a position for it internally)

    Also, you mentioned adding memory. Again, this is a difficult process since the modules are located internally and not easy to get at. Be sure to read all instructions at ifixit first before opening up your iMac.

  10. #25
    The slowest 2017 iMac on Earth - How to diagnose which is the issue?
    pm-r's Avatar
    Member Since
    Oct 16, 2010
    Location
    Brentwood Bay, BC, Canada
    Posts
    12,528
    Rep Power
    20
    Replacing the hard drive with an SSD may not be as easy as you think with that model iMac.
    As Charlie states, you may want to do some checking.

    OWC (macsales.com) shows various upgreade available for that stlye iMac, just choose your specific model here:
    Upgrades for iMac (3.60 GHz, Retina 4K, 21.5-inch, 2017) (courtesy everymac.com)



    - Patrick
    ======

  11. #26
    Not sure if this will help, I'm not very techy and you may have already done this, but can you back up your mac, restore it to factory settings then re download all your stuff?

  12. #27
    Quote Originally Posted by hamnickel View Post
    Hi all!

    Thanks for your help and for reading this post. I’ll try to be as short as possible. I have an iMac 2010 and it’s still running like a champ today. This machine became very sluggish twice, once in 2016 when I installed Mavericks on it. So I bought some RAM, upgraded it to 14GB of RAM and then it ran like new. Last year it became very slow again but the issue went away when I emptied my 1TB HD which was almost totally full.

    This year I finally had some money to upgrade this old machine. After months searching I found a great deal, a 2017 iMac (4K retina, core i5, Radeon Pro 555 2GB, 8GB RAM, 1TB HD) for 1.250 USD (yes, that’s what we call a pretty good deal here in Brazil). I bought it. When I tested it I noticed that it was running poorly, the system was sluggish but I thought “well, I’m going to format this, install Catalina and everything will run smoothly”. I went home and did that but, oh, I was wrong. Since I formatted and installed Catalina this machine is running very poorly. Compared to my 2010 iMac it’s super annoying to use this and there were times I wished to throw it in the wall.

    I have screens freezing / unresponsive and loading icons all the time. I’m using it as a regular user for daily chores (Chrome browser with a few tabs opened and very lightweight apps opened like Spotify and Notes). I’d like to know if there’s a way to inspect the hardware via software to check if there’s some faulty component causing those issues. I already installed iStats Menu but I can’t see anything wrong judging by its stats.

    I already bought two 8GB of RAM and I have a SSD that I want to install on it. I bought a kit to open it as well. These things are coming from China and they’ll take a long time to get to my house (2 months or so). It’s my fist time doing that and I know it’s not going to be an easy task but companies here charge 250 USD just to install RAM and SSD on an iMac (if you already bought the RAM+SSD, if not they can charge you up to 500 USD or more for this job).

    I’m trying to work using this computer but it’s such a chore. I don’t have those problems with my old iMac and that bothers me. Both are running mechanical HDs so I don’t think that this machine is slow because of the HD. There are cases here in Brazil from people selling old 2013/2014 MacBook Pros that are actually 2009/2010 MacBooks. They change the About screen on the system to pass it as a newer model. So after knowing this, anything is possible, and this machine is so slow that I really doubt about its specs.

    Anyway, if anyone can help me with that I’ll be very glad and grateful!

    Thank you so much if you read all this rant. If you don’t want to waste your time just read the TL-DR.

    TL-DR: I bought an used 2017 iMac (MRT32BZ/A) last month and it’s running slow as hell. It seems very inferior compared to my iMac 2010. I have screens freezing / unresponsive and loading icons all the time. I’m using it as a regular user for daily chores (Chrome browser with a few tabs opened and very lightweight apps opened like Spotify and Notes). I’d like to know if there’s a way to inspect the hardware via software to check if there’s some faulty component causing those issues.
    Reading the thread, the most likely problem is with the hard drive. I have had great luck with SpinRite 6, a superb way to test and restore data on HDD and SDD from grc.com - the worst hard drive I used it on had over 256,000 uncorrectable disk errors. SpinRite took days, and said it fixed all but 4 bits (yes, bits, not sectors, not clusters), and the PC booted and ran Windows after the fix. However, SpinRite comes as a Windows program that generates a boot disk/USB drive for a PC. It can be run on a Mac but it is complicated see Running SpinRite 6.0 on MacOS (Part 1) – Kevin's tech blog . If you purchase SpinRite 6 now you will get a free upgrade to the next update which will run natively on Macintosh.

  13. #28
    The slowest 2017 iMac on Earth - How to diagnose which is the issue?
    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Keller, Texas
    Posts
    59,361
    Your Mac's Specs
    2017 27" iMac, 10.5" iPad Pro, iPhone 7+, iPhone 8, Numerous iPods, Catalina
    Rep Power
    54
    By the time he buys SpinRite and goes thru hoop jumping to get it to work on a modern Mac, he could replace the HDD with a SSD and add memory if he's up to it. SpinRite is a waste of time in my opinion especially since hard drives and even SSDs are much less expensive than they used to be.

  14. #29
    The slowest 2017 iMac on Earth - How to diagnose which is the issue?
    jpdemers's Avatar
    Member Since
    Aug 29, 2009
    Location
    New York City
    Posts
    20
    Your Mac's Specs
    Mini on steroids; 2011 iMac, 2012 MB Pro
    Rep Power
    11
    Mojave and Catalina assume the presence of an SSD, and have been optimized for that sort of fast I/O. In particular, there's a lot of swapping between RAM and the drive, and virtual memory is used extensively. Combine that with an old, slow, and possibly failing HD - the very opposite of what the OS is expecting - and it's not hard to imagine a system that slows to a crawl when it attempts to use the drive for what should be routine operations.

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