Apple Releases macOS High Sierra 10.13.4 Security Update - MacRumorsOpen MenuShow RoundupsShow Forums menuVisit ForumsOpen Sidebar
Skip to Content

Apple Releases macOS High Sierra 10.13.4 Security Update

Apple today released a new security update for macOS High Sierra 10.13.4, which comes nearly one month after the first version of macOS High Sierra 10.13.4 was released to the public.

macoshighsierra10134
The new macOS High Sierra security update 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.

According to Apple's release notes, Security Update 2018-001 is recommended for all users and is meant to improve the security of macOS. The update addresses two security vulnerabilities related to Crash Reporter and LinkPresentation, both of which could be used maliciously to gain access to a Mac. A Safari 11.1 update is also included, with fixes for WebKit vulnerabilities.

Additional information on what's included in the security update can be found in the accompanying support document.

Related Forum: macOS High Sierra

Popular Stories

Home Hub Command Center with Dome Base Feature

Apple Smart Home Hub to Feature iMac G4-Style Design

Wednesday September 30, 2026 4:36 am PDT by
Apple's long-rumored smart home hub will have an iMac G4-style design and a host of unique features, Bloomberg's Mark Gurman reports. The smart home hub is said to feature a square 6-inch display, with variants that can be placed on a countertop or mounted on a wall. It features a single FaceTime camera on the front, with microphones and speakers in its connected base. Gurman described the...
HomePod minis on gradient feature 1 1

Three New Apple Smart Home Products Coming on October 13

Wednesday September 30, 2026 4:04 am PDT by
Apple plans to introduce a series of new smart home products on Tuesday, October 13, according to Bloomberg's Mark Gurman. Apple reportedly plans to debut its long-awaited smart home hub device, a new HomePod mini, and a new Apple TV on the date. The new HomePod mini and Apple TV are set to retain their existing designs, but tout faster chips to support Siri AI. The new HomePod mini will...
Apple TV Sans Remote Feature

New Apple TV 4K Leaked

Friday September 25, 2026 8:16 am PDT by
MacRumors contributor Aaron Perris has uncovered an image file from Apple for an unreleased Apple TV 4K, suggesting that a new model will finally be released soon. The image is specifically for an "Apple TV 4K (4th generation)" model. Apple TV 4K (4th generation) image (on a gradient) The image reveals that the Apple TV will have the same external design as the current model, with all of its...

Top Rated Comments

keysofanxiety Avatar
110 months ago
Wow, 1GB. That’s one heck of a security update.
Score: 9 Votes (Like | Disagree)
110 months ago
Does DisplayLink's sketchy driver work again?
Score: 7 Votes (Like | Disagree)
redheeler Avatar
110 months ago
It's good that Apple didn't decide to wait until 10.13.5 to fix these vulnerabilities. My only concern is that El Capitan and Sierra have yet to receive the update.
[doublepost=1524591551][/doublepost]
Oh no just with every update for about a year now, my Mac will not boot up afterwards unless I restore it from a backup ...
This definitely isn't normal. I'd recommend doing a fresh install of the latest version and restoring only the apps / files you need from backup.
Score: 6 Votes (Like | Disagree)
keysofanxiety Avatar
110 months ago

And WHERE did you find THAT info?
Well, when the article was posted I eagerly opened the App Store on my Mac and began the download, licking my lips in anticipation for the newest OS patch.

As it began downloading, I noticed the size of the update was exactly 1.0GB. My face pouted slightly and I gave my stubble a quizzical stroke, noting at that point that I should probably invest in a new razor.

"Security Updates which are in the same x.x.x version are historically quite small", I told myself. "They're not normally 1GB. How odd!"

As if by magic, the trackpad gravitated back to the MacRumors Safari tab and I publicly mused my confusion in the very comment you are quoting.

Does this help?
Score: 5 Votes (Like | Disagree)
110 months ago
Fix DisplayLink yet?
Score: 5 Votes (Like | Disagree)
TheBensonBoy Avatar
110 months ago
Wow, 1GB. That’s one heck of a security update.
Surely they also fixed a few bugs that they know are there, so they were embarrassed to mention. Or they didn't fix it and the software lately is just that bad.
Score: 5 Votes (Like | Disagree)
Latest Stories
Apple TV Still Down for Some Users Following Apple Services Outage
Apple TV Still Down for Some Users Following Apple Services Outage
8 minutes ago
PSA: Apple Mail on Mac May Stop Syncing Microsoft 365 Accounts Today
PSA: Apple Mail on Mac May Stop Syncing Microsoft 365 Accounts Today
33 minutes ago
Apple's Smart Home Hub: Everything We Know So Far
Apple's Smart Home Hub: Everything We Know So Far
11 hours ago
Apple's Home Hub Borrows From the iPhone Duo's StandBy Mode
Apple's Home Hub Borrows From the iPhone Duo's StandBy Mode
12 hours ago
Apple Invites App Updated With Three New Features
Apple Invites App Updated With Three New Features
16 hours ago
Apple Event on October 13?
Apple Event on October 13?
17 hours ago
Apple Watch SE 3 vs. Series 12 Buyer's Guide: Which Should You Buy?
Apple Watch SE 3 vs. Series 12 Buyer's Guide: Which Should You Buy?
19 hours ago
iPad Mini 8 to Offer These 10 New Features
iPad Mini 8 to Offer These 10 New Features
19 hours ago
DoorDash Unveils AI Food Ordering Through Apple's Messages App
DoorDash Unveils AI Food Ordering Through Apple's Messages App
21 hours ago
Amazon Takes Up to $150 Off Select M5 MacBook Air Models
Amazon Takes Up to $150 Off Select M5 MacBook Air Models
21 hours ago
Apple Still Plans to Release a New Full-Sized HomePod
Apple Still Plans to Release a New Full-Sized HomePod
22 hours ago
Apple Working to Expand HomeKit
Apple Working to Expand HomeKit
23 hours ago
Apple Smart Home Hub to Feature iMac G4-Style Design
Apple Smart Home Hub to Feature iMac G4-Style Design
23 hours ago
Three New Apple Smart Home Products Coming on October 13
Three New Apple Smart Home Products Coming on October 13
1 day ago
Apple Pay Now Available in India With Axis Bank Cards
Apple Pay Now Available in India With Axis Bank Cards
1 day ago
OpenAI Launches Always-On 'Dots' Agents to Rival Meta's Muse
OpenAI Launches Always-On 'Dots' Agents to Rival Meta's Muse
2 days ago
AirPods 5 Teardown: Batteries Removable, Case Still Tough
AirPods 5 Teardown: Batteries Removable, Case Still Tough
2 days ago
iPhone 18 Pro Owners Complain of Speaker Crackling or Popping
iPhone 18 Pro Owners Complain of Speaker Crackling or Popping
2 days ago
You Can 'Get Ready' for iPhone Duo Pre-Orders on October 12
You Can 'Get Ready' for iPhone Duo Pre-Orders on October 12
2 days ago
Apple Pay Reportedly Launching in India Today
Apple Pay Reportedly Launching in India Today
2 days ago
Apple Releases New AirPods Beta Firmware
Apple Releases New AirPods Beta Firmware
2 days ago
Apple Shares New Guide for Using iOS 27 Parental Controls
Apple Shares New Guide for Using iOS 27 Parental Controls
2 days ago
Apple Creator Studio and Final Cut Camera Get New Features
Apple Creator Studio and Final Cut Camera Get New Features
2 days ago
Apple Explains Why It Removed ICE Tracking Apps Last Year
Apple Explains Why It Removed ICE Tracking Apps Last Year
2 days ago
Amazon Expands $779.99 Apple Watch Ultra 4 Deal to More Models
Amazon Expands $779.99 Apple Watch Ultra 4 Deal to More Models
2 days ago
Switch Siri AI for ChatGPT on Your Mac
Switch Siri AI for ChatGPT on Your Mac
2 days ago
Apple Says Emergency SOS via Satellite Now Available in Norway
Apple Says Emergency SOS via Satellite Now Available in Norway
2 days ago
AppleCare Guide: Is it Worth Paying For?
AppleCare Guide: Is it Worth Paying For?
2 days ago
Apple Reportedly Planned to Replace 5,000 Support Employees With AI
Apple Reportedly Planned to Replace 5,000 Support Employees With AI
2 days ago
Apple Planning to Launch Products Faster and More Often
Apple Planning to Launch Products Faster and More Often
2 days ago

🔗 Related Apple News & Rumors

Stay updated with the latest Apple ecosystem news and verified rumors