diff --git a/.github/workflows/test-mlperf-inference-abtf-poc.yml b/.github/workflows/test-mlperf-inference-abtf-poc.yml
index 9fdbc1489..e1e352c61 100644
--- a/.github/workflows/test-mlperf-inference-abtf-poc.yml
+++ b/.github/workflows/test-mlperf-inference-abtf-poc.yml
@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, ubuntu-20.04, ubuntu-24.04]
+        os: [ubuntu-22.04, ubuntu-20.04, ubuntu-24.04]
         python-version: [ "3.8", "3.12" ]
         backend: [ "pytorch" ]
         implementation: [ "python" ]
@@ -63,7 +63,7 @@ jobs:
         python3 -m pip install cmind
         cm pull repo --url=${{ github.event.pull_request.head.repo.html_url }} --checkout=${{ github.event.pull_request.head.ref }}
         cm pull repo mlcommons@cm4abtf --branch=poc
-    - name: Test MLPerf Inference ABTF POC using ${{ matrix.backend }} natively
+    - name: Test MLPerf Inference ABTF POC using ${{ matrix.backend }} on ${{ matrix.os }}
       run: |
         cm run script --tags=run-abtf,inference,_poc-demo --adr.compiler.tags=gcc --quiet  -v --gh_token=${{ secrets.ABTF_ACCESS_TOKEN }}
     
diff --git a/script/download-file/customize.py b/script/download-file/customize.py
index 9bf56e78a..78362181d 100644
--- a/script/download-file/customize.py
+++ b/script/download-file/customize.py
@@ -5,7 +5,6 @@
 def preprocess(i):
 
     os_info = i['os_info']
-
     env = i['env']
     meta = i['meta']
 
@@ -127,7 +126,8 @@ def preprocess(i):
     #verify checksum if file already present
     if env.get('CM_DOWNLOAD_CHECKSUM', '') != '':
         x='*' if os_info['platform'] == 'windows' else ''
-        env['CM_DOWNLOAD_CHECKSUM_CMD'] = "echo {} {}{}{}{} | md5sum -c ".format(env.get('CM_DOWNLOAD_CHECKSUM'), x, q, env['CM_DOWNLOAD_FILENAME'], q)
+        x_c='s' if os_info['platform'] == 'darwin' else ''
+        env['CM_DOWNLOAD_CHECKSUM_CMD'] = "echo {} {}{}{}{} | md5sum -c{} ".format(env.get('CM_DOWNLOAD_CHECKSUM'), x, q, env['CM_DOWNLOAD_FILENAME'], q, x_c)
     else:
         env['CM_DOWNLOAD_CHECKSUM_CMD'] = ""