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  1. #1

    Member Since
    Dec 19, 2013
    Mac Pro Freezes momentarily and frequently
    About a month ago my Mac pro started behaving strangely. It will freeze for 2-5 seconds where nothing appears to work. Sometimes the beachball spins, other times it doesn't. It does it in all applications. The screen doesn't change at all and there is no other visual clues except that sometimes the cursor turns to the pointing hand instead of the arrow. When the freeze ends the computer catches up to whatever I was doing before.

    It's not a new computer - it's a first generation Mac Pro, but a year ago Apple replaced the mother board and the processors because it had been incorrectly repaired a few years earlier and some thermal paste had been omitted. The drives are all new and when this started I cloned the main drive to a new one to eliminate a hard drive failure as a possibility. I've run permissions checks both with the apple utility and Cocktail.

    When we replaced the main board I replaced all the memory

    So here's the specs of the system:

    2 x 2.66 GHz Dual Core Xeon
    16GB 667 MHz DDR2 FB-DIMM memory all from Kingston and all 2GB units and all slots used
    ATI Radeon HD 5770 (new last year)
    OSX 10.7.5 (the last update that would run on this machine)
    None of the drives have more than 50% use

    Other than being annoying it doesn't seem to have any other issue (data isn't being lost). Any suggestions would be welcome.

  2. #2

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Nambucca Heads Australia
    iMac i5 2.7GHz, 16GB memory, OS 10.11.1.
    Not keen on Kingston memory or SSD's had them fail. OWC and Crucial recommended around here. Try removing all the memory and start off with 2x2GB modules and test them all out. Sounds like a memory problem.
    Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!

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