diff --git a/scripts/network_bandwidth.sh b/scripts/network_bandwidth.sh
index b560812..b381e24 100755
--- a/scripts/network_bandwidth.sh
+++ b/scripts/network_bandwidth.sh
@@ -37,23 +37,38 @@ interface_get() {
   echo "$name"
 }
 
-# interface_bytes give interface name and signal tx/rx return Bytes
+# interface_bytes give an interface name and return both tx/rx Bytes, separated by whitespace (upload first)
 interface_bytes() {
-  cat "/sys/class/net/$1/statistics/$2_bytes"
+  case "$(uname -s)" in
+  Linux)
+    upload=$(cat "/sys/class/net/$1/statistics/tx_bytes")
+    download=$(cat "/sys/class/net/$1/statistics/rx_bytes")
+
+    echo "$upload $download"
+    ;;
+  Darwin)
+    # column 7 is Ibytes (in bytes, rx, download) and column 10 is Obytes (out bytes, tx, upload)
+    netstat -nbI "$1" | tail -n1 | awk '{print $10 " " $7}'
+    ;;
+  esac
 }
 
 # get_bandwidth return the number of bytes exchanged for tx and rx
 get_bandwidth() {
-  upload="$(interface_bytes "$1" "tx")"
-  download="$(interface_bytes "$1" "rx")"
+  local upload=0
+  local download=0
 
-  #wait the interval for Wait for interval to calculate the difference
+  IFS=' ' read -r upload download <<< "$(interface_bytes "$1")"
+
+  # wait for interval to calculate the difference
   sleep "$INTERVAL"
 
-  upload="$(bc <<<"$(interface_bytes "$1" "tx") - $upload")"
-  download="$(bc <<<"$(interface_bytes "$1" "rx") - $download")"
+  IFS=' ' read -r new_upload new_download <<< "$(interface_bytes "$1")"
 
-  #set to 0 by default useful for non-existent interface
+  upload=$(( $new_upload - $upload ))
+  download=$(( $new_download - $download ))
+
+  # set to 0 by default
   echo "${upload:-0} ${download:-0}"
 }