Fix CEF_API_HASH_PLATFORM missing from cef_version_macarm64.h

cmake_prepare_pyx.py reads CEF_API_HASH_PLATFORM and CEF_API_HASH_UNIVERSAL
from the platform version header. The standard cef_version.h shipped with
the CEF binary distribution does not contain these fields — they live in
cef_api_versions.h under an OS_MAC platform guard.

Fix: hard-code the correct macOS experimental-API hash (CEF_API_VERSION
999999) sourced from cef_api_versions.h in the Windows binary
(OS_MAC guard: 6fc5fada42e6b3e5b09a3a40f66da555cdbd8d5e). Both Intel
and ARM64 macOS share this value as CEF uses a single OS_MAC define.

Also remove the "Update version header from downloaded CEF" CI step that
copied the stripped cef_version.h (no API hash) over our crafted header,
causing the KeyError at build time.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: linesight

.github/workflows/ci-macos.yml

@@ -56,11 +56,6 @@ jobs:
       - name: Download CEF binaries
         run: python tools/download_cef.py
 
-      - name: Update version header from downloaded CEF
-        run: |
-          cef_dir=$(ls -d build/cef_binary_*_macosarm64 2>/dev/null | head -1)
-          cp "$cef_dir/include/cef_version.h" src/version/cef_version_macarm64.h
-
       - name: Prepare prebuilt CEF
         run: python tools/automate.py --prebuilt-cef
 

src/version/cef_version_macarm64.h

@@ -50,10 +50,11 @@
 
 #define CEF_SANDBOX_COMPAT_HASH "06ced0d54abb1a72"
 
-// API hashes for macOS ARM64 (CEF_API_VERSION 999999).
-// These are overwritten by the CI from the downloaded CEF package headers.
-#define CEF_API_HASH_PLATFORM "95e5118d3fc65ae6c2645b6f381947d38586e669"
-#define CEF_API_HASH_UNIVERSAL "95e5118d3fc65ae6c2645b6f381947d38586e669"
+// Experimental API hash for macOS (CEF_API_VERSION 999999).
+// Used by the cefpython build tools; sourced from cef_api_versions.h
+// (OS_MAC platform guard) in the CEF binary distribution.
+#define CEF_API_HASH_PLATFORM "6fc5fada42e6b3e5b09a3a40f66da555cdbd8d5e"
+#define CEF_API_HASH_UNIVERSAL "6fc5fada42e6b3e5b09a3a40f66da555cdbd8d5e"
 
 #define DO_MAKE_STRING(p) #p
 #define MAKE_STRING(p) DO_MAKE_STRING(p)