diff --git a/stm32CubeProg.sh b/stm32CubeProg.sh
index 403d1a425..9e8a0bb38 100644
--- a/stm32CubeProg.sh
+++ b/stm32CubeProg.sh
@@ -2,6 +2,7 @@
 set -o nounset # Treat unset variables as an error
 # set -o xtrace  # Print command traces before executing command.
 
+UNAME_OS="$(uname -s)"
 STM32CP_CLI=
 INTERFACE=
 PORT=
@@ -55,11 +56,21 @@ aborting() {
 
 # parse command line arguments
 # options may be followed by one colon to indicate they have a required arg
-if ! options=$(getopt -a -o hi:ef:o:c:r:d:v:p: --long help,interface:,erase,file:,offset:,com:,rts:,dtr:,vid:,pid: -- "$@"); then
-  echo "Terminating..." >&2
-  exit 1
-fi
-
+case "${UNAME_OS}" in
+  Darwin*)
+    echo "Warning: long options not supported due to getopt from FreeBSD usage."
+    if ! options=$(getopt hi:ef:o:c:r:d:v:p: "$@"); then
+      echo "Terminating..." >&2
+      exit 1
+    fi
+    ;;
+  *)
+    if ! options=$(getopt -a -o hi:ef:o:c:r:d:v:p: --long help,interface:,erase,file:,offset:,com:,rts:,dtr:,vid:,pid: -- "$@"); then
+      echo "Terminating..." >&2
+      exit 1
+    fi
+    ;;
+esac
 eval set -- "$options"
 
 while true; do
@@ -109,10 +120,13 @@ while true; do
       shift
       break
       ;;
+    *)
+      echo "Unknown option $1"
+      usage 1
+      ;;
   esac
 done
-# Check STM32CubeProgrammer cli availability, fallback to dfu-util if protocol dfu
-UNAME_OS="$(uname -s)"
+# Check STM32CubeProgrammer cli availability
 case "${UNAME_OS}" in
   Linux*)
     STM32CP_CLI=STM32_Programmer.sh