iMac Pro Everything freezes up, but the mouse cursor

Discussion in 'iMac' started by gr8pics, Jun 10, 2019.

  1. gr8pics macrumors regular

    gr8pics

    Joined:
    Jan 20, 2008
    #1
    My imac pro is 2 months old, and latelly it has starting to freeze up every week or so.
    No warning or indications, it just happens, especially when in Safari.
    Only solution is to force quit with the power button, which im not very happy with.

    Ive seen posts with the same issue as far back as 2010, but no solution.
    Anyone else happen to know what causes this?
    Im on the latest OSX and everything else latest...
     
  2. fmenard macrumors newbie

    Joined:
    Feb 10, 2005
    Location:
    Daytona Beach, FL
    #2
    I just went through the same, or similar, situation with a trash can Pro. The cursor (pointer) would freeze, and the trackpad I use (Apple) would cease being operable. The only way to get out of this was to power down by pulling the plug, and restart. The report pane consistently showed the instance as a "panic". I assume this means kernel panic. I tried everything I could think of, but couldn't cure it by myself after emptying the cache, clearing the browser history, and restart. Since I couldn't keep a browser running I couldn't research an answer on the web. It happened in Safari browser windows, as well as in Chrome windows. I called support at Apple, and they recommended a fresh install of Mojave. I checked my iCloud backups and went through the fresh install with their guidance, in safe mode. After a few failed attempts, I got to the point of being prompted to choose a location for the install. Big problem, as there wasn't any available location - no choices available. Support advised that it was a hardware problem, and to take the unit in to a store or authorized repair center. I took it in today, and won't find out the situation for 24-48 hours. Luckily I've still got Apple Care on the unit. I'll respond after the repair center finds the cause and repairs (hopefully) it.
     
  3. gr8pics thread starter macrumors regular

    gr8pics

    Joined:
    Jan 20, 2008
    #3
    Wow, what a mess, but it sounds like you have the oposite problem of mine. Cursor is the ONLY thing responding, but no click or keyboard button will respond to anything.
     
  4. mikehalloran macrumors 65816

    Joined:
    Oct 14, 2018
    Location:
    The Sillie Con Valley
    #4
    How often do you reboot? If the answer isn't Daily, try that and see.
     
  5. gr8pics thread starter macrumors regular

    gr8pics

    Joined:
    Jan 20, 2008
    #5
    Nonsense! Ive runned all my Macs for weeks, even months, for 15 years without rebooting, this is not the issue.
     
  6. mikehalloran macrumors 65816

    Joined:
    Oct 14, 2018
    Location:
    The Sillie Con Valley
    #6
    Ha!

    You even posted "Ive runned all my Macs for weeks, even months, for 15 years without rebooting, this is not the issue." without my telling you the problem first. Good. You saved us both some time.

    Don't worry, enough armchair experts will likely descend on this thread with all sorts of nonsense telling you why I'm wrong and you're right—that can't be the problem.

    Except that it is. A Mac freezing with the cursor still working is the exact symptom of not having enough free RAM available and you confirmed my suspicion.

    That is exactly the issue. Reboot daily. You won't have it anymore. I promise.

    Memory leaks are a fact of life and I don't care that you don't believe. Neither do I know the cause of yours—again, I don't care.

    My 2010 iMac had 32GB and would freeze after 30–36 hours unless I rebooted daily. My 128GB iMac Pro takes 5–6 days to do the same thing, In my case, I know the causes of the leaks but I can't do anything about it. Except reboot every few days.
     
  7. hfg, Jun 10, 2019
    Last edited: Jun 10, 2019

    hfg macrumors 68040

    hfg

    Joined:
    Dec 1, 2006
    Location:
    Cedar Rapids, IA. USA
    #7
    I am having similar issues with a new 2019 iMac i9 with 2TB SSD. I suspected memory was at fault, but have replaced the stock 8G, with 32G, and purchased a second set of 32G with continued freezing in all possible memory combinations. Freezes and/or reboots occur about once every day or two ... sometimes a couple in the same day. Can not be restarted without a SMC reset (power cord pulled).

    I have the exact same program configuration in a 2017 iMac i7, 2TB SSD which has had "zero" issues like this in 2 years ... usually fresh booting once or twice a week at most (normally just left on to sleep when unused). This was the source for system migrations as part of fresh OS X Mojave install to the new iMac.

    I tried several OS reloads, including a fresh install of Mojave and fresh download/install of the programs I regularly use and nothing else. Same problem ... usually dies with just Safari and Mail open, usually while browsing the MacRumors forum.

    It has now been in an Apple shop for 2 weeks ... 1/3 of my total ownership time.

    Frustrating !!!
     
  8. gr8pics thread starter macrumors regular

    gr8pics

    Joined:
    Jan 20, 2008
    #8
    Yea, this is an issue ive never had before with any machine, and must be caused by other complex things than just «leaking memory»
    Why didnt happen before, and why on a imac pro with 32gb and not allot weaker machines?
    What are the typical sources for the leaks then?

    I know that Lightroom tends to suck out memory if kept open over time, or more correctly Hdd space, but not beyond the possibility to just kill the app, and not the entire machine?
    Since its been in the Apple service for this, they must admit that something is not right, and just not tell you to reboot everyday, which makes sense.

    «Congrats with your new 7000$ imac, btw, it has to be rebooted everyday to keep it working»
    This is beyond ridiculous for so many reasons.
    Just to mention one, my machine also serves as a server when im not home, so it needs to be up at least 3 weeks in a run.
    Please let us know what the A store finds out.
     
  9. fmenard macrumors newbie

    Joined:
    Feb 10, 2005
    Location:
    Daytona Beach, FL
    #9
    My issue with the cursor freeze has apparently turned out to be a bad stick of Apple ram. The authorized repair center chased it down to that, and I'll go get it after they finish up. Apple care saved the day as far as cost is concerned, and having them here (Asheville, NC) saved me from a drive to Charlotte. Hopefully, this is the end of the problem. hfg, I hope the Apple store can solve your issue.
     
  10. gr8pics thread starter macrumors regular

    gr8pics

    Joined:
    Jan 20, 2008
    #10
    Interesting, how much ram do you have? Was it leaking, or simply not working?
    I guess regular warranty will cover this, if you dont have Apple care?
     
  11. Fishrrman macrumors P6

    Fishrrman

    Joined:
    Feb 20, 2009
    #11
    OP --

    It's still under warranty, take it into an Apple Store for a checkup.

    I agree with Mr. Halloran.
    That is, shut down at night, reboot in the morning.
    I've been following this practice with my own Macs for 32 years now.
    Seems to work fairly well.

    I suggest you just TRY this for a period of 4 consecutive days.
    At the end of that period, give us your report.
     
  12. JustMartin macrumors 6502a

    Joined:
    Feb 28, 2012
    Location:
    UK
    #12
    If it's a memory usage issue, that should be evident on the activity monitor, right? That should tell you both the overall memory pressure and the culprit. I've seen both Safari and Libre Office leak on my iMac, caused a major slowdown because of swapping, but didn't actually kill the computer. it might be worth keeping the machine on, with activity monitor running in a corner of the screen somewhere.
     
  13. gr8pics thread starter macrumors regular

    gr8pics

    Joined:
    Jan 20, 2008
    #13
    Thats what im doing these days.

    I also have a imac 27 - 2015 with 32gb, running the same way with apps, it never once happened to that, only with my brand new imac pro, i think that is strange.

    It seems to run at 15-20gb of 32gb, and shouldnt be any problem, but ill try to keep the act monitor visible to see which is on top when it freezes.
    A little thing ive noticed, is that the greenmemory graph is almost at the bottom, even when its consuming about 50%, why?
     

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12 June 10, 2019