Sluggish behaviour, iMac Retina 5K, Late 2015

Discussion in 'iMac' started by espenbandersson, Dec 13, 2016.

  1. espenbandersson macrumors newbie

    Joined:
    Dec 13, 2016
    #1
    Hi,

    I have two computers at my office:
    - iMac Retina 5K, 27-inch, Late 2015. 3.2 GHz Intel Core i5. 8 GB 1867 MHz DDR 3.
    - Macbook Retina, 12-inch, Early 2016. 1.2 GHz Intel Core m5. 8 GB 1867 MHz LPDDR3.

    What seems strange to me, is the iMac performance. I experience lots of small delays when doing really basic stuff in Google Chrome, Adobe Photoshop and Fantastical 2, and several times a day get the spinning mouse cursor and have to wait for several seconds before continuing.

    I have had quite a few iMacs over last years, and never seen this before. And the MacBook works like a beauty doing the same stuff.

    Any ideas? I've tried to reinstall MacOS, new user accounts++, but the issue(s) remain.

    Hardware issue, maybe?
     
  2. rbart macrumors regular

    Joined:
    Nov 3, 2013
    Location:
    France
    #2
    In your iMac, do you have a 1Tb standard HDD, or Fusion drive or pure SSD ?
     
  3. espenbandersson thread starter macrumors newbie

    Joined:
    Dec 13, 2016
  4. rbart macrumors regular

    Joined:
    Nov 3, 2013
    Location:
    France
    #4
    That's why it is so slow...
    Apple should not sell so slow machines in 2015 ...
     
  5. espenbandersson thread starter macrumors newbie

    Joined:
    Dec 13, 2016
  6. rbart macrumors regular

    Joined:
    Nov 3, 2013
    Location:
    France
    #6
    You have a fast CPU, fast GPU, fast RAM but you slow storage ruins the experience. Each time your Mac needs to access data you waste a lot of time.
    macOS needs a lot of I/O accesses and a slow disk is a real bottleneck.
     
  7. espenbandersson thread starter macrumors newbie

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    Dec 13, 2016
  8. JustMartin macrumors 6502a

    Joined:
    Feb 28, 2012
    Location:
    UK
    #8
    The first and obvious question is whether it has always been slow or whether this has developed over time. It is easy to point the finger at the hard disk and I would blame it too if the computer's speed has always been unsatisfactory. But, otherwise it could be something else.
     
  9. rbart macrumors regular

    Joined:
    Nov 3, 2013
    Location:
    France
    #9
    You can add an external SSD on USB3 or thunderbolt and move you system and applications on it.
    Or tear down the screen and install a SATA SSD in place of the HDD (more efficient but more risky).
     
  10. espenbandersson thread starter macrumors newbie

    Joined:
    Dec 13, 2016
    #10
    Yeah. I'm not 100 % sure when it started or if it has always been; I use both machines daily, but moved the more demanding tasks to my iMac recently, which is when I started noticing.
     
  11. Fishrrman macrumors G4

    Joined:
    Feb 20, 2009
    #11
    OP asks:
    "Is it possible to upgrade the storage?"

    Yes.

    But my advice is: DON'T try to open it and install a drive that way. Too much can go wrong.

    Instead, buy a USB3 external SSD and plug it in.
    Initialize it with Disk Utility, then either:
    a. Install a clean copy of the OS onto it, or
    b. Use a cloning app such as CarbonCopyCloner to clone the contents of the internal drive onto it. (This works only if the SSD is large enough to hold the contents of the internal drive).
    Set it up to be an "external booter" (with the OS, accounts, and apps).

    It will SOLVE your speed problems.

    Something like this will do the trick:
    http://www.amazon.com/exec/obidos/ASIN/B00ZTRY532?tag=delt-20

    Get either the 240gb or 480gb version. Even the 240gb may be "enough".

    Note: you probably want to keep "large libraries" (such as music, movies, and photos) on the existing internal HDD.
    This way, the external SSD is kept "lean, fast and clean".

    Important:
    DISREGARD the warnings others will post about a USB booter not having TRIM enabled.
    I've been booting and running my own 2012 Mac Mini like this going on FOUR YEARS now, and TRIM has NEVER been enabled.
    It runs as fast and smooth today as the day I first set it up in January 2013.

    Aside:
    The Mac doesn't really care from which drive it boots.
    External or internal...
     

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