Apple Seeds Third Beta of macOS High Sierra 10.13.5 to Developers [Public Beta Available] - MacRumors
Skip to Content

Apple Seeds Third Beta of macOS High Sierra 10.13.5 to Developers [Public Beta Available]

Apple today seeded the third beta of an upcoming macOS High Sierra 10.13.5 update to developers, two weeks after seeding the second beta and 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 will be 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 to be stored in iCloud rather than on your iPhone, iPad or Mac, saving valuable storage space. Older attachments are also stored in iCloud.

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 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 two betas of macOS High Sierra 10.13.5, but we'll update this post should any new features be found in the third.

The previous macOS High Sierra 10.13.4 update 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 public beta of macOS High Sierra 10.13.5 available to its public beta testing group.

Related Forum: macOS High Sierra

Popular Stories

Apple Event Logo

Apple's Next Era Begins September 1

Thursday May 7, 2026 10:36 am PDT by
Apple recently announced that Tim Cook will be stepping down as CEO later this year, after 15 years of leading the company. Effective September 1, Apple's hardware engineering chief John Ternus will become the company's next CEO, while Cook will become executive chairman of Apple's board of directors. In his new role, Apple said Cook will assist with "certain aspects" of the company,...
Four iPhone 18 Pro Colors Mock Feature

iPhone 18 Pro Launching in September With These 10 New Features

Saturday May 9, 2026 6:03 am PDT by
While the iPhone 18 Pro and iPhone 18 Pro Max are not launching until September, there are already plenty of rumors about the devices. It was initially reported that the iPhone 18 Pro models would have fully under-screen Face ID, with only a front camera visible in the top-left corner of the screen. However, the latest rumors indicate that only one Face ID component will be moved under the...
Apple Watch Series 10 Jet Black Touch ID

Apple Watch Series 12 and watchOS 27: What to Expect Later This Year

Friday May 8, 2026 2:07 pm PDT by
While not too much has been reported about the next Apple Watch models, there are a few rumors about potential design changes and watchOS 27 features. Apple Watch Series 12 and Apple Watch Ultra 4 models are expected to be released in September, and we have outlined some of the key rumored hardware and software changes below. A new Apple Watch SE is not expected this year, as that model was...

Top Rated Comments

105 months ago
I pray that they fix the Dell DisplayLink being broken since the 10.11.4 update. Have useless monitors laying around now :(
Score: 6 Votes (Like | Disagree)
105 months ago
Fix DisplayLink yet???
Score: 4 Votes (Like | Disagree)
105 months ago
Maybe they can FINALLY fix all of the GUI issues that are occurring on HS.
Score: 1 Votes (Like | Disagree)
105 months ago
AirPlay 2 is mainly about multi-room support. As a side effect, the latency will change. Currently, all AirPlay devices operate at a fixed latency of 2 seconds. With AirPlay 2, the latency is negotiated with the participating devices, and if they can manage a lower latency, they'll take advantage of that.



There'll definitely still be a delay. Wireless doesn't come without latency.



It already should support that on both iOS and macOS. What video player are you using?
When I use the homepod on my mac, no matter what app I'm using or what website I'm on, audio / video is never synced up. Thats the problem I'm referring to. From what I've read online it seems everyone has this problem.

If I watch a video on my phone through homepod, the audio / video will be synced. But on my mac audio/video is never synced while using homepod, which makes it really frustrating. I never really minded this cause I assumed airplay 2 would fix it, or at least the new software in the fall would. But people are now making me second guess that.

Someone please tell me this will be fixed! I get that it works through wifi, not bluetooth, but literally every other sh**ty speaker I have has NO audio / video sync problems when connected to my mac, kinda insane that a top of the line Apple speaker would have this problem connected to an apple device.
Score: 1 Votes (Like | Disagree)
chucker23n1 Avatar
105 months ago
Stop making things up or guessing. I have an Airplay enabled hifi receiver (over wifi) with absolutely zero delay (mouth to audio sync have imperceivable delay), same with using my MBP as an audio source for streaming audio to my receiver via my AppleTV, so yes, that zero delay is and will be possible with HomePod.
Actually, AirPlay 1 always has a fixed two-second delay.
Score: 1 Votes (Like | Disagree)
105 months ago
This is because the AirPods are bluetooth, while the HomePods are Airplay (wifi) only, which requires a couple of seconds of buffering. Don't wait for a fix because there will be never one.
Stop making things up or guessing. I have an Airplay enabled hifi receiver (over wifi) with absolutely zero delay (mouth to audio sync have imperceivable delay), same with using my MBP as an audio source for streaming audio to my receiver via my AppleTV, so yes, that zero delay is and will be possible with HomePod.
Score: 1 Votes (Like | Disagree)