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Security


APPLE’S NEW MACOS SEQUOIA UPDATE IS BREAKING SOME CYBERSECURITY TOOLS

Lorenzo Franceschi-Bicchierai
10:08 AM PDT • September 19, 2024

Comment

Image Credits: Soeren Stache/picture alliance / Getty Images

On Monday, Apple released its latest computer operating system update called
macOS 15, or Sequoia. And, somehow, the software update has broken the
functionality of several security tools made by CrowdStrike, SentinelOne,
Microsoft, and others, according to posts on social media, as well as messages
posted in a Mac-focused Slack channel. 

At this point, it’s unclear exactly what is the issue, but it appears to affect
several products made by companies that provide software for macOS users and
enterprises, which has caused frustration among people who work on and with
macOS-focused security tools.



“As a developer of macOS security tools, it’s incredibly frustrating to time and
time again have to deal with (understandably) upset users (understandably)
blaming your tools for breaking their Macs, when in reality it was Apple’s fault
all along,” said Patrick Wardle, the founder of Mac and iOS security startup
DoubleYou, and a longtime expert on macOS security. 

“I get it, that writing bug-free software is challenging, but maybe if Apple
spent less time and money on marketing, and more time on actually testing their
software, we’d all be better off!” Wardle told TechCrunch.

On the day of macOS Sequoia’s release, a CrowdStrike sales engineer said in a
Slack room for Mac admins that the company had to delay support for the new
version of Mac’s operating system. “I’m very sorry to report that we will not be
supporting Sequoia on day 1 in spite of our intention (and previous track
record) to support the latest OS within hours of [General Availability],” the
engineer said in the message, seen by TechCrunch. 

The engineer also said CrowdStrike sent out a “Tech Alert” to customers, adding
that “there’s quite a lot going on with the changes in the network stack.”

”We’re also tracking some similar issues with other vendors, and have feedback
and a case in to Apple. While we would love for there to be a fast-follow patch
that resolves this for us, we’re acting under the assumption there won’t be and
we’ll need to fix it in our code with a sensor release,” the sales engineer
wrote. 

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CONTACT US

Do you work at a cybersecurity company whose products are affected by the macOS
update? From a non-work device, you can contact Lorenzo Franceschi-Bicchierai
securely on Signal at +1 917 257 1382, or via Telegram and Keybase @lorenzofb,
or email. You also can contact TechCrunch via SecureDrop.



“Please trust me when I say this was looked at through every angle, to see if
there was any way to continue to provide the best protection to our customers on
this new OS without having to delay,” the CrowdStrike engineer wrote.
“Ultimately it was decided that the best course to protect our Mac fleets is to
wait until this is resolved.”



Also, several people on Reddit reported having issues with CrowdStrike’s
security product on the new macOS. 

CrowdStrike spokesperson Kevin Benacci told TechCrunch on Thursday that the
company is “currently waiting for a macOS Sequoia update and will provide
official support. We respectfully refer you to Apple for any additional
questions.”

Apple did not respond to requests for comment. 

On Monday, a SentinelOne Support account warned customers in the same
Mac-focused Slack channel: “Do not upgrade your endpoints until you have a
supported SentinelOne Agent,” citing a series of issues with the new macOS
version. 

SentinelOne did not respond to a request for comment.



After publication, SentinelOne spokesperson Craig VerColen said in an email:
“SentinelOne delivered full support for macOS Sequoia immediately upon its
release this past Monday as covered on our blog and support sites.”



ESET also alerted customers of a network connection issue after upgrading to
macOS Sequoia. An ESET representative did not respond to our request for
comment. 

After publication, ESET spokesperson Jessica Beffa said that ESET products “are
compatible with the new macOS.”

Other people in the same Slack reported having issues with Microsoft Defender
for macOS after the Sequoia update. Microsoft did not respond to a request for
comment.

Security researcher Will Dormann wrote on Mastodon that he was having issues
with DNS and running his firewall on his macOS machine. Another security
researcher, Wacław Jacek, wrote in a blog post that, “it seems the OS firewall
can sometimes start blocking access to web browsing after upgrading to macOS
Sequoia,” and shared a potential workaround. 



The problems with macOS Sequoia appear to have caused issues with Firefox
browser users, too, according to a separate Reddit thread. Damiano Damonte, a
spokesperson for Mozilla, said in an email to TechCrunch after publication that
Mozilla, which make the Firefox browser, “received reports” of issues from some
users and Mozilla reported the problem to Apple, but has not yet been able to
reproduce the bug in testing.

This story has been updated to include comments from ESET, SentinelOne, and
Mozilla.




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TAGS

Apple, bugs, CrowdStrike, ESET, macos, macOS 15, macOS Sequoia, Microsoft,
Security, SentinelOne

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