Apple Seeds Fourth Beta of macOS High Sierra 10.13.5 to Developers [Update: Public Beta Available]

Apple today seeded the fourth beta of an upcoming macOS High Sierra 10.13.5 update to developers, one week after seeding the third beta and more than a month after releasing the macOS High Sierra 10.13.4 update.

The new macOS High Sierra 10.13.5 beta can be downloaded through Apple Developer Center or the Software Update mechanism in the Mac App Store with the proper profile installed.

macoshighsierra10135beta
macOS High Sierra 10.13.5 introduces support for Messages on iCloud, a feature that was previously present in macOS High Sierra 10.13.4 betas before being pulled ahead of the release of the update. Messages on iCloud is also available in iOS 11.4.

The Messages on iCloud feature is designed to store your iMessages in iCloud for improved syncing. Right now, incoming iMessages are sent to all devices where you're signed into your Apple ID, but it's not true cloud-based syncing because your old messages don't show up on new devices nor does deleting a message remove it from all of your devices, both features enabled through Messages on iCloud.

Messages on iCloud also allows your older iMessages and attachments to be stored in iCloud rather than on your iPhone, iPad or Mac, saving valuable storage space.

The update also likely includes bug fixes and performance improvements for issues that weren't addressed in macOS High Sierra 10.13.4, but as Apple does not provide detailed release notes for macOS High Sierra beta updates, we may not know exactly what's included until the new software is provided to the public.

No major outward-facing changes were found in the first three betas of macOS High Sierra 10.13.5, but we'll update this post should any new features be found in the fourth.

The previous update, macOS High Sierra 10.13.4, brought support for external graphics processors (eGPUs) along with Business Chat in Messages and several other bug fixes and smaller feature improvements.

Update: Apple has made a new version of macOS High Sierra 10.13.5 available to public beta testers.

Related Forum: macOS High Sierra

Popular Stories

maxresdefault

Apple Shows Off a Key Reason to Upgrade to the iPhone 17

Saturday February 7, 2026 9:26 am PST by
Apple today shared an ad that shows how the upgraded Center Stage front camera on the latest iPhones improves the process of taking a group selfie. "Watch how the new front facing camera on iPhone 17 Pro takes group selfies that automatically expand and rotate as more people come into frame," says Apple. While the ad is focused on the iPhone 17 Pro and iPhone 17 Pro Max, the regular iPhone...
Finder Siri Feature

Why Apple's iOS 26.4 Siri Upgrade Will Be Bigger Than Originally Promised

Friday February 6, 2026 3:06 pm PST by
In the iOS 26.4 update that's coming this spring, Apple will introduce a new version of Siri that's going to overhaul how we interact with the personal assistant and what it's able to do. The iOS 26.4 version of Siri won't work like ChatGPT or Claude, but it will rely on large language models (LLMs) and has been updated from the ground up. Upgraded Architecture The next-generation...
wwdc sans text feature

Apple Rumored to Announce New Product on February 19

Thursday February 5, 2026 12:22 pm PST by
Apple plans to announce the iPhone 17e on Thursday, February 19, according to Macwelt, the German equivalent of Macworld. The report, citing industry sources, is available in English on Macworld. Apple announced the iPhone 16e on Wednesday, February 19 last year, so the iPhone 17e would be unveiled exactly one year later if this rumor is accurate. It is quite uncommon for Apple to unveil...
apple wallet drivers license feature iPhone 15 pro

Apple Says These 7 U.S. States Plan to Offer iPhone Driver's Licenses

Monday February 9, 2026 6:24 am PST by
In select U.S. states, residents can add their driver's license or state ID to the Apple Wallet app on the iPhone and Apple Watch, and then use it to display proof of identity or age at select airports and businesses, and in select apps. The feature is currently available in 13 U.S. states and Puerto Rico, and it is expected to launch in at least seven more in the future. To set up the...
14 inch MacBook Pro Keyboard

New MacBook Pros Could Now Arrive in March

Sunday February 8, 2026 6:02 am PST by
New MacBook Pro models with the M5 Pro and M5 Max chips could arrive as soon as Monday, March 2, according to Bloomberg's Mark Gurman. In today's "Power On" newsletter, Gurman said that the release of new MacBook Pro models is tied to the release of macOS Tahoe 26.3. The launch is said to be slated for as early as the week of March 2. He added that the M4 Pro and M4 Max models on sale today...

Top Rated Comments

scottlitch Avatar
101 months ago
Is HomeKit coming to MacOS?
Score: 5 Votes (Like | Disagree)
jjhny Avatar
101 months ago
This is typically the magic number for me to think about trusting it on my workstations. Around the the 5th revision.

I used to jump right into the newest OS, but it isn't worth it anymore. They don't do enough real world Q&A.
Score: 4 Votes (Like | Disagree)
fhall1 Avatar
101 months ago
This is typically the magic number for me to think about trusting it on my workstations. Around the the 5th revision.

I used to jump right into the newest OS, but it isn't worth it anymore. They don't do enough real world Q&A.
For the last three major versions (10.10, 10.11, and 10.2) I have waited until September to update to the final revision (e.g 10.12.6) just before the new major OS version is released. Then I stay there until the next Sept......rinse, repeat. This way I (hopefully) get the most stable release of the current OS version, just before it's not current any more. Any third party hardware and software should have been updated and with Apple not really including "must-have" features in the brand new OS versions lately, this process has served me well.
Score: 4 Votes (Like | Disagree)
ignatius345 Avatar
101 months ago
Still no APFS for Fusion Drives??!! I fell like I'm living in a limbo...:mad:
We've been living with HFS+ for 20 years. Another few months ain't gonna kill us.

I'd rather it work rock solidly than deal with weird anomalies with my data, thanks.
Score: 3 Votes (Like | Disagree)
Babygotfont Avatar
101 months ago
Is HomeKit coming to MacOS?
... that comes in 10.14
Score: 2 Votes (Like | Disagree)
OscarMV Avatar
101 months ago
I got out of the iOS beta when 11.3 went live. I so missed iMessage in the Cloud that I recently installed 11.4 on my phone and iPad. Was still hurting that the latest version of Mac OS beta didn't appear to have the feature. I guess they just added it based on this story. It is painful having to delete like 30 messages in the Mac app. Click the little X, click the delete confirmation, click the little X, click the delete confirmation, repeat 28 more times.
If you don't want to take your hands off the keyboard, press command-D to confirm deletion.

It used to be that you could skip deletion verification by pressing command-option-delete or option-click on the X, but that got removed with Messages in the Cloud.
Score: 1 Votes (Like | Disagree)