# Advanced Configuration and Power Interface ## Identification [[Kernel Extension|Kernel extensions]] (`.kext`) historically extended the macOS kernel for hardware such as RAID or storage controllers. Apple now prefers system extensions, which run in user space and reduce kernel-level risk ([Apple deployment guide](https://support.apple.com/guide/deployment/system-extensions-in-macos-depa5fb8376f/web)). [[Accusys|Accusys]] and [[HighPoint Technologies|HighPoint Technologies]] make storage and RAID hardware. [[Advanced Configuration and Power Interface|ACPI]] describes platform configuration/power interfaces; [[System Management Controller|SMC]] is Apple’s hardware-management controller. ## Notebook evidence - [[Scanned_20260730-1719#PDF page 19 — macOS kernel extensions, storage controllers, and historical dates|PDF page 19: macOS kernel extensions, storage controllers, and historical dates]] — The dates likely come from driver files, certificates, builds, or device metadata rather than the notebook’s writing date. The author is tracing which third-party storage extension attaches to which hardware and framework. ## Relationships and overlays The source places this note in a shared evidence cluster with [[Accusys|Accusys]] · [[HighPoint Technologies|HighPoint Technologies]] · [[Kernel Extension|Kernel Extension]] · [[Scanned_20260730-1706|Scanned_20260730-1706]] · [[System Management Controller|System Management Controller]]. Within the larger collection, this evidence extends [[Vendor-Agnostic Recovery|vendor-agnostic recovery]] and [[Continuity Architecture|continuity architecture]] by showing how software, hardware, identity, and pre-OS control depend on recoverable interfaces. ## Evidentiary status and open leads Capture `kextstat`, bundle identifiers, code-signing data, and hardware PCI IDs together to distinguish installed, loaded, and merely present extensions. ## Source - [[Scanned_20260730-1719|Scanned_20260730-1719]]