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4 Reasons Not to Install macOS High Sierra 10.13.5 & 10 Reasons You Should



These are the reasons not to install macOS High Sierra and the reasons you should make time to install the new macOS update now that we’re on macOS 10.13.5 and the update is installed on millions of machines worldwide.

The macOS 10.13.5 includes overall fixes and stability upgrades as well as support for Messages in iCloud. This new feature stores your texts and iMessages in iCloud and keeps them synced between all of your devices. You will need iOS 11.4 installed on iPhone or iPad to fully use this feature.

You may see a notification for the macOS High Sierra update, and some users report the update is automatically downloading to their computer. You will be able to choose if you want to install the High Sierra upgrade on your Mac and if you want to install the latest update.

While there are more reasons to install, the few reasons not to install are very important. While there were problems that should make some users wait to install macOS 10.13, many are fixed in macOS 10.13.5.

If you are coming from macOS Sierra, this is a much bigger update than the upgrades that you’ve installed for the past year, so you should spend a little more time preparing for the High Sierra update than a small point release. The same is true for the upgrade to macOS 10.13.5 if you are coming from 10.12. There are major new features for Safari, Siri, Notes, iCloud and other services and apps you use on your Mac every day and there are even new macOS emoji.

If you’re trying to decide if you should upgrade to macOS High Sierra or stay on macOS Sierra, this guide will walk you through the reasons to install High Sierra and the reasons to stay on macOS Sierra for now.

Here’s Why You Shouldn’t Install macOS High Sierra;

  1. Don’t Install if You Aren’t Prepared
  2. Don’t Install if You Are Worried About macOS High Sierra Problems
  3. Don’t Install if You Use a Really old Mac
  4. Don’t Install if You’re Traveling

Here’s Why You Should Update to macOS High Sierra:

  1. Install if you have macOS Sierra Problems
  2. Install for Messages in iCloud
  3. Install for New Emoji
  4. Install for Safari Upgrades
  5. Install for New Photos Features
  6. Install if You Need Better Security
  7. Install macOS Sierra External GPU & VR Support
  8. Install If You’re Using iOS 11 on your iPhone and iPad
  9. Install for Apple File System
  10. Install for New Notes Features
  11. Install for Exciting New macOS High Sierra Features
Here are the reasons to install macOS High Sierra and the reasons not to.

Here are the reasons to install macOS High Sierra and the reasons not to.

You can upgrade to the new version of macOS and keep your data on your computer, or you can opt for a clean install of macOS High Sierra that gives you a fresh start.

Apple’s macOS High Sierra update is free to all users and there is no expiration on the free upgrade, so you don’t need to be in a rush to install it. Most apps and services will work on macOS Sierra for at least another year. While some are already updated for macOS High Sierra, others are still not quite ready.

Here’s our guide on the reasons to install macOS High Sierra and the reasons not to install High Sierra yet.

Install for Messages in iCloud

Install for Messages in iCloud

iCloud can now keep all of your messages in the cloud and synced to all of your other Apple devices. You need iOS 11.4 or higher installed on your mobile devices and macOS 10.13.5 for your Mac. 

This works for your iMessages and your text messages and will even free up space on your iPhone. This works with the free iCloud storage plan, but you may need a paid one depending on how many photos and videos you send by text. 

When you delete a message on one device it will sync to delete across your other devices. No more re-reading the same messages over and over. 



  1. German

    11/13/2017 at 8:54 am

    What would it be a really old Mac? I have a MacBook Pro late 2011.. would it be this a really old one?

    • JackDanielJenkins

      03/09/2018 at 7:25 pm

      Same question – I have a MacBook Pro Retina (Late 2013)

      Seems anything over 3 months old is considered “really old” these days.

  2. Morten Carlsen

    12/13/2017 at 1:50 pm

    Every time I come here to read about Apple (I find this site via Google) I never get a straight answer nor opinion.

    Not once do you ever dare to call the child by its name.

    Are you afraid of Apple ?

  3. Prudencio Mendez Jr

    05/31/2018 at 7:39 am

    Trouble with the version 10.13.4 and Safari and the slowness never seen before. I hope Apple is aware that they NEED to get a better version. I have had no problems with Firefox…

  4. Marikov

    08/24/2018 at 12:17 am

    Hey! I have MacBook pro retina 2015. Is that old?

  5. Victor

    08/27/2018 at 10:31 am

    Look at the upgrade requirements information. As I recall if your Mac is 2009 or later, you should be OK.


    11/11/2018 at 11:48 am

    After 50 years of writing software and managing software development programs, including operating systems, I would label the Mac high sierra software as junk software. I have version 10.13.6. Mac mail is nearly unworkable, and almost every operation leads to a spinning beachball.
    Come on, guys, just make one stable version of OSX that recaptures the Mac-feel of the operating system that drew us to Macs in the first place.

    • David Collins

      07/02/2019 at 10:16 pm

      Absolutely. Apple: have dancing girls careering across the screen if your sales manager imagines that’s what your 16- to 26-year old target customers want, but don’t forget, as you have done, that a lot of people actually depend on their systems WORKING, reliably, no glitches, no down-time while problems generated by your latest heap of increasingly-irrelevant software are sorted out. And glued-together hardware doesn’t impress all of us, either.

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