So if you are a developer still working on Kernel Extension, it's time to move to System Extension. Apple has been deprecating kernel extensions (KEXTs) in favor of system extensions, marking a fundamental shift in how third-party software interacts with macOS.
Why Apple is Making the Change
- Security - Kernel extensions run with full kernel privileges, creating security risks
- Stability - Buggy KEXTs can crash the entire system
- Apple Silicon - The new architecture requires different approaches
- User Control - System extensions give users more visibility and control
What Are System Extensions?
System extensions run in user space rather than kernel space. They provide similar functionality to kernel extensions but with better security isolation. Types include:
- Network Extensions - For VPNs, proxies, and content filters
- Endpoint Security Extensions - For security products monitoring system events
- Driver Extensions - For USB, audio, and other device drivers
Migration Considerations
- Identify which KEXT functionality needs to be migrated
- Evaluate available system extension frameworks
- Plan for user approval requirements
- Test on both Intel and Apple Silicon Macs
- Update deployment and MDM configurations
Endpoint Security Framework
For security products, the Endpoint Security framework provides:
- File system event monitoring
- Process lifecycle events
- Network events (with Network Extension)
- Authorization decisions
Timeline
Apple has been progressively restricting kernel extensions. New installations require user approval, and some categories are no longer permitted on Apple Silicon Macs. Organizations should prioritize migration to avoid compatibility issues.
Conclusion
The transition from kernel extensions to system extensions is not optional—it's essential for continued macOS compatibility. Start your migration now to avoid disruption.
At Incrux, we have extensive experience migrating from KEXTs to System Extensions. Contact us for expert guidance.