Apple is fixing bugs in macOS Sequoia that broke some cybersecurity tools

In September, Apple released a new version of its computer operating system macOS 15, also known as Sequoia, which broke the functionality of many cybersecurity products, including those made by CrowdStrike and Microsoft.

Three weeks later, on Friday, Apple released the first update to macOS 15, and it says it fixed those problems. In the macOS 15.0.1 release notes, Apple says the update “improves compatibility with third-party security software.”

Apple flagged the update in an email to TechCrunch on Thursday, and an Apple spokesperson did not respond to a follow-up request for more details.

Patrick Wardle, founder of DoubleYou security for macOS and iOS, as well as an Apple security expert and developer of several free security tools for macOS, wrote in X that the macOS update includes “fixes for communication problems that plagued the initial release of -macOS 15.”

“And to any Apple apologist who blames third-party vendors, you deserve to be slapped with a big fish since this was a previously reported Apple bug. [golden master],” Wardle wrote, referring to the first public release of the macOS 15 software.

When Apple first released macOS 15, several cybersecurity experts said they were unable to use some security tools, such as CrowdStrike’s Falcon and Microsoft Defender, because of an apparent bug in the new macOS operating system.

Meanwhile, CrowdStrike spokesman Kevin Benacci said the company is “waiting for the macOS Sequoia update” to provide official support for its cybersecurity products on Apple’s operating system.

Ugur Koc, a developer who works as a cloud engineer at cloud managed service provider Glueckkanja, said on X that the new macOS update “solves the problem by [Microsoft] Endpoint Defender and other antivirus software, when the network filter was causing problems with the Internet connection.”

Neither CrowdStrike nor Microsoft responded to a request for comment.