Upgraded Late 2015 iMac to High Sierra

Discussion in 'iMac' started by Balthorn, Oct 13, 2017.

  1. Balthorn macrumors newbie

    Jun 9, 2016
    I had to take my late 2015 iMac into the Apple Store for an issue and they upgraded it to the current OS (High Sierra).

    I am wondering how is High Sierra performing on the late '15 iMac? Any firsthand reports? Is it slower? I was previously on El Capitan and I am concerned if things will run slower/worse now. Is that possible?

    The reason I am asking is I have had some bad luck with updating Apple products in the past. Thanks!
  2. redfirebird08 macrumors 6502


    Feb 15, 2007
    I haven’t upgraded to High Sierra yet, but the regular Sierra seems a lot faster than El Capitan on my Late 2009 iMac.
  3. Balthorn thread starter macrumors newbie

    Jun 9, 2016
    I have experienced MacBook Pros etc becoming slower in the past due to upgrading OSs, so I am cautious.

    I didn't have enough time to use it today to be able to tell if there is a difference or not. I thought I was detecting some lag etc but that could've just been paranoia setting in.

    I paid close to $3000 for the computer so I don't want it to become obsolete so recently after buying.

    Is High Sierra much different from Sierra in terms of overall stress on the system? That may be one way we can tell.
  4. cynics macrumors G4

    Jan 8, 2012
    From Sierra I haven't noticed much of a difference, if anything it is slightly better. Mountain Lion, Mavericks, El Cap, Sierra and now High Sierra have all offered similar base performance for me on the same system. Yosemite was the only MacOS I had lackluster performance with.

    There are some thing with High Sierra that will benefit performance. HEVC will work better obviously. Thing that utilize Metal 2. And of course if you have an SSD (not HDD or FD) it got APFS which offers its own benefits for performance (like cloning) and HDD/FD user will get the update for APFS later.

    You'll also get the latest and most secure native apps like Safari, Mail, Messages, Siri, etc all with their new features.

    Overall I don't think High Sierra is an update to avoid.
  5. Balthorn thread starter macrumors newbie

    Jun 9, 2016
    Good to know. thanks.

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