diff --git a/requirements.txt b/requirements.txt
index 9fd5d6d..35c1cde 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ coloredlogs
 python3-wget
 beautifulsoup4
 jsonmerge
-spdx-tools>=0.8.2;sys_platform!="win32"
+spdx-tools==0.8.*;sys_platform=="linux"
 setuptools>=65.5.1 # not directly required, pinned by Snyk to avoid a vulnerability
 numpy; python_version < '3.8'
 numpy>=1.22.2; python_version >= '3.8'
diff --git a/src/fosslight_util/output_format.py b/src/fosslight_util/output_format.py
index b70ef69..21df414 100644
--- a/src/fosslight_util/output_format.py
+++ b/src/fosslight_util/output_format.py
@@ -183,11 +183,11 @@ def write_output_file(output_file_without_ext: str, file_extension: str, scan_it
         elif format == 'yaml':
             success, msg, _ = write_yaml(result_file, scan_item, False)
         elif format.startswith('spdx'):
-            if platform.system() != 'Windows':
-                success, msg, _ = write_spdx(output_file_without_ext, file_extension, scan_item, spdx_version)
-            else:
+            if platform.system() == 'Windows' or platform.system() == 'Darwin':
                 success = False
-                msg = 'Windows not support spdx format.'
+                msg = f'{platform.system()} not support spdx format.'
+            else:
+                success, msg, _ = write_spdx(output_file_without_ext, file_extension, scan_item, spdx_version)
     else:
         if file_extension == '.xlsx':
             success, msg = write_result_to_excel(result_file, scan_item, extended_header, hide_header)