diff --git a/.github/workflows/build-macos.yml b/.github/workflows/build-macos.yml
index 9d417942..55f3591a 100644
--- a/.github/workflows/build-macos.yml
+++ b/.github/workflows/build-macos.yml
@@ -26,7 +26,10 @@ jobs:
       matrix:
         debug: [false, true]
         zts:   [true]
-        os: ['14']
+        # Homebrew 7.0.0 made macOS 14 Tier 3 and builds no bottles for it, so
+        # every dependency built from source there, llvm among them for nghttp2;
+        # GitHub removes the macos-14 runners on 2026-11-02.
+        os: ['15']
 
     name: "MACOS_ARM64_${{ matrix.debug && 'DEBUG' || 'RELEASE' }}_${{ matrix.zts && 'ZTS' || 'NTS' }}"
     runs-on: macos-${{ matrix.os }}
diff --git a/.github/workflows/ctrl-c.yml b/.github/workflows/ctrl-c.yml
index 0debb444..d11d5c25 100644
--- a/.github/workflows/ctrl-c.yml
+++ b/.github/workflows/ctrl-c.yml
@@ -19,10 +19,8 @@ on:
       - '.github/workflows/ctrl-c.yml'
 
 env:
-  # TODO: back to `true-async` / `main` after the #109 sigaction-hook pair merges
-  # (php-src 109-zend-sigaction-hook + php-async fix-signal-pcntl-clobber).
-  PHP_SRC_BRANCH: 109-zend-sigaction-hook
-  PHP_ASYNC_BRANCH: fix-signal-pcntl-clobber
+  PHP_SRC_BRANCH: true-async
+  PHP_ASYNC_BRANCH: main
   CCACHE_DIR: /tmp/ccache
 
 jobs:
@@ -31,7 +29,7 @@ jobs:
   # --------------------------------------------------------------------
   ctrl-c-macos:
     name: "CTRLC_MACOS_ARM64"
-    runs-on: macos-14
+    runs-on: macos-15  # macos-14 runners are removed on 2026-11-02
     timeout-minutes: 60
 
     steps:
diff --git a/.github/workflows/debug-macos-workers.yml b/.github/workflows/debug-macos-workers.yml
index 22a80964..4f465343 100644
--- a/.github/workflows/debug-macos-workers.yml
+++ b/.github/workflows/debug-macos-workers.yml
@@ -18,7 +18,7 @@ env:
 jobs:
   workers:
     name: MACOS_ARM64_WORKERS_DEBUG
-    runs-on: macos-14
+    runs-on: macos-15  # macOS 14: no Homebrew bottles, runners removed 2026-11-02
     timeout-minutes: 40
 
     steps: