Skip Namespace remote cache probe on macOS

Scripts/ci/nscloud-cache.sh

@@ -52,6 +52,23 @@ configure_bazel_remote_cache() {
     return 0
   fi
 
+  local bazelrc_path
+  bazelrc_path="${NSC_BAZELRC_PATH:-${TMPDIR:-/tmp}/burrow-nsc-cache.bazelrc}"
+  portable_mkdir -p "$(dirname "$bazelrc_path")"
+
+  if [[ "$(uname -s 2>/dev/null || true)" == "Darwin" ]]; then
+    append_bazel_storage_cache "$bazelrc_path"
+    export BURROW_BAZEL_NSCCACHE_ACTIVE=0
+    export BURROW_BAZEL_NSCCACHE_BAZELRC="$bazelrc_path"
+    echo "::warning ::Namespace Bazel remote cache probe skipped on macOS; using local Bazel repository/disk cache."
+    if [[ -n "${GITHUB_ENV:-}" ]]; then
+      echo "BURROW_BAZEL_NSCCACHE_ACTIVE=0" >> "$GITHUB_ENV"
+      echo "BURROW_BAZEL_NSCCACHE_BAZELRC=$bazelrc_path" >> "$GITHUB_ENV"
+      echo "NSC_BAZELRC_PATH=$bazelrc_path" >> "$GITHUB_ENV"
+    fi
+    return 0
+  fi
+
   export BURROW_BAZEL_NSCCACHE_ACTIVE=0
   if ! command -v nsc >/dev/null 2>&1; then
     if bash Scripts/ci/ensure-nsc.sh; then
@@ -68,9 +85,6 @@ configure_bazel_remote_cache() {
     fi
   fi
 
-  local bazelrc_path
-  bazelrc_path="${NSC_BAZELRC_PATH:-${TMPDIR:-/tmp}/burrow-nsc-cache.bazelrc}"
-  portable_mkdir -p "$(dirname "$bazelrc_path")"
   local probe_timeout="${BURROW_NSC_CACHE_PROBE_TIMEOUT:-30s}"
   if optional_timeout "$probe_timeout" nsc auth check-login >/dev/null 2>&1 &&
     optional_timeout "$probe_timeout" nsc cache bazel setup --bazelrc "$bazelrc_path" >/dev/null 2>&1; then

evolution/proposals/BEP-0009-release-infrastructure-and-store-upload-pipeline.md

@@ -52,7 +52,9 @@ The same change also makes the forge itself the release authority: release tags
   probes must be timeout-bounded so Apple builds can continue without the
   remote cache. Apple workflows should call the fail-open cache helper directly
   instead of entering the full Nix development shell just to decide whether a
-  cache is available.
+  cache is available. macOS runners should use the local Bazel disk/repository
+  cache path and skip the `nsc` remote-cache auth probe, which is optional and
+  can block without GNU timeout support.
 - Produce unsigned Apple validation artifacts when signing is absent, but require signing for an App Store requested iOS release and for a Sparkle tester release. Uploadable artifacts are produced only after provisioning profiles can be synced from App Store Connect credentials and the relevant Apple certificate is proven to match the selected Google KMS key.
 - Resolve release credentials through age/agenix before signed Apple lanes run. Forgejo secrets should carry only the runner age identity fallback and the Authentik WIF client secret until OpenBao can mint the runner token directly. App Store Connect keys and signing certificates live as sealed files under `secrets/`.
 - Persist the forge runner SSH key as `/var/lib/forgejo-runner-agent/age_keystore` and export `BURROW_RUNNER_AGE_IDENTITY_PATH` so jobs can resolve agenix identities without embedding long-lived material in every workflow.