diff --git a/README.md b/README.md
index 63d2df4..0409747 100644
--- a/README.md
+++ b/README.md
@@ -51,7 +51,7 @@ and provides helpers to run (and replay) migrations until it works.
 
 **Prerequites:**
 
-* The tools run on debian system
+* The tools run on both Debian and MacOS systems
 * You should have docker installed on your system
 * Some features require extra packages. To have all the features available run:
 
diff --git a/newsfragments/39 b/newsfragments/39
new file mode 100644
index 0000000..e12bc7c
--- /dev/null
+++ b/newsfragments/39
@@ -0,0 +1,2 @@
+Fix BSD mkdir incompatibility on macOS by using single-character
+flags for 'mode' and 'parents' for cross-platform folder creation (#39)
diff --git a/odoo_openupgrade_wizard/tools/tools_system.py b/odoo_openupgrade_wizard/tools/tools_system.py
index 057736e..7522ab9 100644
--- a/odoo_openupgrade_wizard/tools/tools_system.py
+++ b/odoo_openupgrade_wizard/tools/tools_system.py
@@ -35,8 +35,8 @@ def ensure_folder_exists(
     - a log is done at INFO level.
     """
     if not folder_path.exists():
-        cmd = ["--parents", folder_path]
-        cmd = ["--mode", mode] + cmd
+        cmd = ["-p", folder_path]
+        cmd = ["-m", mode] + cmd
         logger.info(f"Creating folder '{folder_path}' ...")
         mkdir(cmd)
 
diff --git a/tests/__init__.py b/tests/__init__.py
index b6de448..54116b7 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -25,7 +25,7 @@ def move_to_test_folder():
     if os.getcwd().endswith("tests/data/output"):
         return
     test_folder_path = Path("tests/data/output")
-    mkdir([test_folder_path, "--parents"])
+    mkdir(["-p", test_folder_path])
     os.chdir(test_folder_path)