The recent release of macOS Sequoia has introduced significant compatibility issues with essential security and networking tools, impacting users of popular software from companies like Microsoft, CrowdStrike, SentinelOne, and more. This disruption, initially reported by Bleeping Computer, has sparked widespread concern among Mac users, particularly those reliant on VPNs, firewalls, and endpoint security solutions.
macOS Sequoia Compatibility Issues
Widespread Impact on Security Software
Users on platforms like Reddit have voiced their frustrations, detailing problems with security software such as ESET Endpoint Security and CrowdStrike Falcon. The issues range from intermittent internet connectivity to complete disruption of functionality. Beyond security software, the incompatibility extends to other networking tools, causing problems like firewall packet corruption, browser SSL failures, and the inability to execute basic network commands like “curl” or “get.” While temporarily disabling these tools provides a workaround, it leaves users vulnerable and highlights the severity of the compatibility issue.
Security Vendors Advise Against Upgrading
CrowdStrike, in a non-public bulletin seen by Bleeping Computer, explicitly cautioned users against upgrading to macOS 15, stating that the changes to internal networking structures require a compatible Mac sensor. SentinelOne echoed this advice, urging users to postpone the upgrade until the compatibility issues are resolved. This unprecedented advisory underscores the seriousness of the problem and the potential risks associated with upgrading to macOS Sequoia.
ESET Network Filter Removal Instructions
VPN Disruptions and Potential Causes
The incompatibility issues also affect various VPN services. Users of Mullvad VPN and corporate VPN solutions have reported connectivity problems, further highlighting the widespread impact of macOS Sequoia’s networking changes. However, some VPNs, such as Proton VPN, appear unaffected and continue to function smoothly on the new operating system. While Apple has not officially commented on the root cause, reports suggest that an outdated feature in macOS 15’s Firewall might be responsible.
A Recurring Issue for Apple OS Releases
This is not an isolated incident. The release of macOS Ventura also presented similar compatibility challenges with third-party security tools. Security expert Patrick Wardle publicly expressed his concerns on LinkedIn, noting a recurring pattern of Apple’s new operating systems disrupting the functionality of essential security software. He pointed to potential problems within the macOS firewall or the lower-level networking extension subsystem, suggesting these components might be corrupting packets or inadvertently altering network structures.
Waiting for a Fix
For users heavily reliant on affected security and networking tools, postponing the upgrade to macOS Sequoia seems prudent. While temporary workarounds exist, they compromise security and are not sustainable long-term solutions. The hope is that Apple will swiftly address these compatibility issues with a subsequent update, allowing Mac users to enjoy the latest features without compromising their security and network functionality.
