macOS 15 Sequoia appears to have broken security tools made by CrowdStrike, SentinelOne, Microsoft, and others; CrowdStrike had to delay support for Sequoia
On Monday, Apple released its latest computer operating system update called macOS 15, or Sequoia.
TechCrunchLorenzo Franceschi-Bicchierai
Context & Ripple Effects
Sequoia’s rollout followed Apple’s June introduction of features including iPhone mirroring and locked-phone notifications and a review that highlighted its new desktop and password-management changes. The compatibility reports add an enterprise-security constraint to an update otherwise framed around user-facing improvements.
The issue matters because endpoint-security software must operate reliably alongside operating-system changes. CrowdStrike’s support delay makes the upgrade decision immediately consequential for organizations standardizing on its tooling.
First-order effects
CrowdStrike, SentinelOne, Microsoft, and other security vendors face compatibility work for macOS 15; CrowdStrike has delayed Sequoia support.
Organizations relying on affected tools may need to defer Sequoia deployments or accept a period without their expected security-tool coverage.
Second-order effects
IT and security teams will need to coordinate OS rollout schedules with endpoint-security validation rather than treating Apple’s release as a routine desktop update.
The incident raises the value of vendors that can quickly certify macOS compatibility, while increasing scrutiny of Apple’s release readiness for security-software partners.
Third-order effects
If major macOS releases repeatedly disrupt endpoint tooling, enterprise adoption will become more dependent on coordinated platform-vendor and security-vendor testing cycles.
This is a test of ecosystem cyber defense: platform changes can improve user capabilities while also reshaping the operational reliability of third-party security layers.
The trend: Enterprise operating-system upgrades are increasingly governed by the compatibility of security controls, not just by the new features delivered by the platform.
FB15174703 - macOS Sequoia Local Network permissions only apply to applications in the /Applications directory. — Any app located elsewhere has full access to devices on the local network without user consent. — Another great piece of engineering by Apple! 🤦 …
MacOS 15 total fail in networking. VPNs not working anymore or something they disconnect without any reason, VMs are not working anymore using Shared Networking (@UTMapp). Sometimes DHCP is simply refusing to provide IP
Worth stressing this was reported to Apple before the GA was released (by multiple people, to multiple teams/orgs within Apple) so Apple 100% knew about this, and shipped macOS 15 anyways 🤦🏻♂️🫠
MacOS 15.0 Sequoia seems to have a major Wi-Fi issue. Has anybody else experienced the same? Any fix? Life has slowed down since I upgraded it. cc @AppleSupport
Ah, what did Apple break now? 🤦🏻♂ ️ Not sure yet if this is indeed a macOS 15 bug, but it appears so? (as multiple unrelated products affected, that were working seamlessly on macOS 14.*) 🤔 Any insight much appreciated. More info here: https://developer.apple.com/ ...
Defender causes a lot of trouble currently with macOS 15 (Sequioa). If you have issues with the internet connection please set the Network Protection to “Audit” until there is an update available that fixes it. I saw Teams and browser connections drop. (If you dont use Network
@patrickwardle apple being apple. bug reported doesn't mean got through the marketing barrier. I wouldn't be surprised if it's still not triaged internally
On macOS 15 and running into networking issues with LuLu (or other network filters such as Defender) installed? It's looking like an Apple/OS issue 🤦🏻♂️ Users have reported “fixes” including: 1️⃣ disabling internal firewall 2️⃣ or updating to macOS 15.1 (beta) @AppleSupport [ima…
ughh, so Apple knew about the macOS 15 firewall/networking issues?! 😭🫠 [Screenshot from a comment “I work for a large tech company, and we (our IT org) opened an issue and notified Apple directly during the beta program. Unfortunately the issue is still present in both the 15.0…