diff --git a/.github/workflows/macos-smoke-test.yml b/.github/workflows/macos-smoke-test.yml
index 8d40aa587bf0..42b05ecd5ac0 100644
--- a/.github/workflows/macos-smoke-test.yml
+++ b/.github/workflows/macos-smoke-test.yml
@@ -1,6 +1,9 @@
 name: macOS Apple Silicon Smoke Test
 
 on:
+  push:
+    branches:
+      - main
   workflow_dispatch:  # Manual trigger
 
 jobs:
@@ -19,13 +22,15 @@ jobs:
             pyproject.toml
           python-version: '3.12'
 
-      - name: Install dependencies
+      - name: Create virtual environment
         run: |
-          uv pip install -r requirements/cpu-build.txt
-          uv pip install -r requirements/cpu.txt
+          uv venv
+          echo "$GITHUB_WORKSPACE/.venv/bin" >> "$GITHUB_PATH"
 
-      - name: Build vLLM
-        run: uv pip install -v -e .
+      - name: Install dependencies and build vLLM
+        run: |
+          uv pip install -r requirements/cpu.txt --index-strategy unsafe-best-match
+          uv pip install -e .
         env:
           CMAKE_BUILD_PARALLEL_LEVEL: 4
 
diff --git a/requirements/cpu-build.txt b/requirements/cpu-build.txt
index 331d02be6621..81d429a5e5f8 100644
--- a/requirements/cpu-build.txt
+++ b/requirements/cpu-build.txt
@@ -4,8 +4,9 @@ packaging>=24.2
 setuptools>=77.0.3,<81.0.0
 setuptools-scm>=8
 --extra-index-url https://download.pytorch.org/whl/cpu
-torch==2.8.0+cpu; platform_machine == "x86_64"
-torch==2.8.0; platform_machine == "ppc64le" or platform_machine == "aarch64" or platform_system == "Darwin"
+torch==2.8.0+cpu; platform_machine == "x86_64" or platform_machine == "s390x"
+torch==2.9.0; platform_system == "Darwin"
+torch==2.8.0; platform_machine == "ppc64le" or platform_machine == "aarch64"
 scons; platform_machine == "aarch64"    # needed to build Arm Compute Library (ACL)
 wheel
 jinja2>=3.1.6