chore: add 15.6 (missing KDK)

Author: blacktop

.github/workflows/c-cpp.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: macos-latest
     strategy:
       matrix:
-        macos-version: [ '15.5' ]
+        macos-version: [ '15.6' ]
     steps:
       - name: Checkout
         uses: actions/checkout@v5

README.md

@@ -34,9 +34,10 @@
 | macOS 15.3 |    ✅     | [DB](https://github.com/blacktop/darwin-xnu-build/releases/download/v15.3/xnu-codeql.zip) |    ❔       /     ❔     |
 | macOS 15.4 |    ✅     | [DB](https://github.com/blacktop/darwin-xnu-build/releases/download/v15.4/xnu-codeql.zip) |    ❔       /     ❔     |
 | macOS 15.5 |    ✅     | [DB](https://github.com/blacktop/darwin-xnu-build/releases/download/v15.5/xnu-codeql.zip) |    ❔       /     ❔     |
+| macOS 15.6 |    🚧     | [DB](https://github.com/blacktop/darwin-xnu-build/releases/download/v15.6/xnu-codeql.zip) |    ❔       /     ❔     |
 
 > [!NOTE]
-> CodeQL DBs built with `MACHINE_CONFIG=VMAPPLE`  
+> CodeQL DBs built with `MACHINE_CONFIG=VMAPPLE`
 > MacOS `14.3` booted:
 > - via Virtualization.framework with `MACHINE_CONFIG=VMAPPLE`
 > - via qemu with `ARCH_CONFIG=x86_64`
@@ -49,7 +50,7 @@ Currently `MACHINE_CONFIG=T8103` is not correctly building for at least `14.3`
 > [!NOTE]
 > When attempting to boot try adding the boot-arg: `sudo nvram boot-args="-unsafe_kernel_text"`
 
-> [!WARNING]  
+> [!WARNING]
 > Booting VMAPPLE kernels in VMs only works on Apple M1s [see issue](https://github.com/blacktop/darwin-xnu-build/issues/22)
 
 ## Why? 🤔

build.sh

@@ -132,7 +132,7 @@ install_ipsw() {
 choose_xnu() {
     if [ -z "$MACOS_VERSION" ]; then
         gum style --border normal --margin "1" --padding "1 2" --border-foreground 212 "Choose $(gum style --foreground 212 'macOS') version to build:"
-        MACOS_VERSION=$(gum choose "12.5" "13.0" "13.1" "13.2" "13.3" "13.4" "13.5" "14.0" "14.1" "14.2" "14.3" "14.4" "14.5" "14.6" "15.0" "15.1" "15.2" "15.3" "15.4" "15.5")
+        MACOS_VERSION=$(gum choose "12.5" "13.0" "13.1" "13.2" "13.3" "13.4" "13.5" "14.0" "14.1" "14.2" "14.3" "14.4" "14.5" "14.6" "15.0" "15.1" "15.2" "15.3" "15.4" "15.5" "15.6")
     fi
     TIGHTBEAMC="tightbeamc-not-supported"
     case ${MACOS_VERSION} in
@@ -256,6 +256,12 @@ choose_xnu() {
         KDKROOT='/Library/Developer/KDKs/KDK_15.5_24F74.kdk'
         RC_DARWIN_KERNEL_VERSION='24.5.0'
         ;;
+    '15.6')
+        RELEASE_URL='https://raw.githubusercontent.com/apple-oss-distributions/distribution-macOS/macos-156/release.json'
+        KDK_NAME='Kernel Debug Kit 15.6 build 24G84'
+        KDKROOT='/Library/Developer/KDKs/KDK_15.6_24G84.kdk'
+        RC_DARWIN_KERNEL_VERSION='24.6.0'
+        ;;
     *)
         error "Invalid xnu version"
         exit 1
@@ -321,7 +327,7 @@ patches() {
         '14.4' | '14.5')
             PATCH_DIR="${WORK_DIR}/patches/14.4"
             ;;
-        '14.6' | '15.0' | '15.1' | '15.2' | '15.3' | '15.4' | '15.5')
+        '14.6' | '15.0' | '15.1' | '15.2' | '15.3' | '15.4' | '15.5' | '15.6')
             PATCH_DIR="${WORK_DIR}/patches/15.0"
             ;;
         *)