diff --git a/.github/workflows/ci-macos-compat.yml b/.github/workflows/ci-macos-compat.yml
index 4682df7b..a0c72b11 100644
--- a/.github/workflows/ci-macos-compat.yml
+++ b/.github/workflows/ci-macos-compat.yml
@@ -17,6 +17,11 @@ jobs:
           - os: warp-macos-15-arm64-6x
             timeout: 20
             smoke: true
+            skip_zig: false
+          - os: warp-macos-26-arm64-6x
+            timeout: 20
+            smoke: false
+            skip_zig: true  # zig 0.15.2 MachO linker can't resolve libSystem on macOS 26
     runs-on: ${{ matrix.os }}
     timeout-minutes: ${{ matrix.timeout }}
     steps:
@@ -62,6 +67,7 @@ jobs:
           ./scripts/download-prebuilt-ghosttykit.sh
 
       - name: Install zig
+        if: ${{ !matrix.skip_zig }}
         run: |
           ZIG_REQUIRED="0.15.2"
           if command -v zig >/dev/null 2>&1 && zig version 2>/dev/null | grep -q "^${ZIG_REQUIRED}"; then
@@ -114,6 +120,8 @@ jobs:
           done
 
       - name: Run unit tests
+        env:
+          CMUX_SKIP_ZIG_BUILD: ${{ matrix.skip_zig && '1' || '0' }}
         run: |
           set -euo pipefail
           SOURCE_PACKAGES_DIR="$PWD/.ci-source-packages"
diff --git a/scripts/build-ghostty-cli-helper.sh b/scripts/build-ghostty-cli-helper.sh
index ac8cda4b..d38e641c 100755
--- a/scripts/build-ghostty-cli-helper.sh
+++ b/scripts/build-ghostty-cli-helper.sh
@@ -53,6 +53,16 @@ if [[ -z "$OUTPUT_PATH" ]]; then
   exit 1
 fi
 
+# Allow CI to skip the zig build (e.g., macOS 26 where zig 0.15.2 can't link).
+# Creates a stub binary so the Xcode Run Script file-existence check passes.
+if [[ "${CMUX_SKIP_ZIG_BUILD:-}" == "1" ]]; then
+  echo "Skipping zig CLI helper build (CMUX_SKIP_ZIG_BUILD=1)"
+  mkdir -p "$(dirname "$OUTPUT_PATH")"
+  printf '#!/bin/sh\necho "ghostty CLI helper stub (zig build skipped)" >&2\nexit 1\n' > "$OUTPUT_PATH"
+  chmod +x "$OUTPUT_PATH"
+  exit 0
+fi
+
 if [[ "$UNIVERSAL" == "true" && -n "$TARGET_TRIPLE" ]]; then
   echo "--universal and --target are mutually exclusive" >&2
   usage >&2