Apple Releases macOS High Sierra 10.13.5 With Messages in iCloud Support - MacRumors
Skip to Content

Apple Releases macOS High Sierra 10.13.5 With Messages in iCloud Support

Apple today released macOS High Sierra 10.13.5, the fifth major update to the macOS High Sierra operating system available on Apple's Mac lineup. macOS High Sierra 10.13.5 comes more than two months after the release of macOS High Sierra 10.13.4, which introduced eGPU support, Business Chat in Messages, and more.

macOS High Sierra 10.13.5 can be downloaded directly from the Mac App Store or through the Software Update function in the Mac App Store on all compatible Macs that are already running macOS High Sierra.

macoshighsierra10135
The macOS High Sierra 10.13.5 update introduces support for Messages in iCloud, a feature that Apple has been testing and working on since macOS High Sierra was announced last June.

Messages in iCloud, as the name suggests, stores your iMessages in iCloud rather than on each of your individual devices, introducing improved cross-device syncing and saving on-device storage space. Messages in iCloud support is also available in iOS 11.4, which was released to the public earlier this week.

macOS High Sierra will be followed by macOS 10.14, a next-generation version of macOS that Apple is expected to introduce at the Worldwide Developers Conference next week.

Related Forum: macOS High Sierra

Popular Stories

iOS 27 Next to iPhone

Here's When iOS 27 Rolls Out Today in Every Time Zone [Update: It's Out]

Sunday September 13, 2026 3:00 am PDT by
Update 10:04 a.m.: iOS 27 is rolling out now, though it may take a bit for all users to see it, so keep checking! Apple is about to release iOS 27, which will finally deliver more advanced Siri AI capabilities as well as a variety of other refinements, improvements, and new features to iPhones. It's Apple's biggest software update of the year, and Apple announced at Wednesday's iPhone event...
iOS 27 Icon iPhone

iOS 27 Available Today With These 8 New Features

Monday September 14, 2026 9:00 am PDT by
Update: Apple has released iOS 27. During its iPhone 18 Pro and iPhone Duo event last week, Apple announced that iOS 27 will be released widely on Monday, September 14. iOS 27 should be available around 10 a.m. Pacific Time / 1 p.m. Eastern Time today via the Settings app, under General → Software Update. Below, we have highlighted eight new features and changes coming with iOS...
deep black iphone 18 pro

Apple Says iPhone 18 Pro Max Sold in U.S. Differs in One Way

Saturday September 12, 2026 3:27 pm PDT by
As noted by Nicolas Lellouche, who writes for the French tech website Numerama, Apple has updated its tech specs pages for the iPhone 18 Pro and iPhone 18 Pro Max to clarify which models are equipped with its new C2 cellular modem and where. Apple now says the iPhone 18 Pro has a C2 modem worldwide, while the iPhone 18 Pro Max uses the chip in every country except for the U.S. According...

Top Rated Comments

FocusAndEarnIt Avatar
108 months ago
Messages in iCloud: delivered on the last business day before it'd be a year since it was announced at the last WWDC. Haha.
Score: 57 Votes (Like | Disagree)
108 months ago
Messages in iCloud: delivered on the last business day before it'd be a year since it was announced at the last WWDC. Haha.
Meh who cares. Better delay it and make it work properly.
Score: 18 Votes (Like | Disagree)
108 months ago
Breaking news:

AirPower will be released at 9:55am PDT Monday just before the keynote.
Score: 15 Votes (Like | Disagree)
macintoshmac Avatar
108 months ago
Messages in iCloud: delivered on the last business day before it'd be a year since it was announced at the last WWDC. Haha.
There was a time when Apple refrained from vapourware. Today, under Cook, they are beginning a dangerous trend into vapourware that brings the respect level down several "notches".

It is one full year and now they are delivering it. These guys used to perfect things in the back before releasing, and one could buy products and use services right on the day of announcement, not any longer. I do not know why, understand why, but I do not like this trend.

Messages in Cloud: 3 days before iOS 12 instead of shipping with 11.
HomePod was announced to come months later, released even more months later.
iMac Pro, previewed. Why! Just launch when ready!

There used to be pride in it. But I do sincerely feel that any kind of personalisation, any sort of character of a company was lost the day Jobs passed away.
Score: 13 Votes (Like | Disagree)
GadgetBen Avatar
108 months ago
So I guess we should all make a diary entry for June 2019 for the main features of the next macOS that will be announced next week?
Score: 12 Votes (Like | Disagree)
nvmls Avatar
108 months ago
So, what’s your point?
Clearly .13.5
Score: 12 Votes (Like | Disagree)