diff --git a/left/build/kds/blhost-unix.sh b/left/build/kds/blhost-unix.sh
new file mode 100755
index 0000000..bd49087
--- /dev/null
+++ b/left/build/kds/blhost-unix.sh
@@ -0,0 +1,38 @@
+#!/bin/sh
+set -e # fail the script if a command fails
+
+PATH=$PATH:/usr/local/bin # This should make node and npm accessible on OSX.
+firmware_image=`pwd`/$1
+usb_dir=../../../lib/agent/packages/usb
+usb_binding=$usb_dir/node_modules/usb/build/Release/usb_bindings.node
+
+case "$(uname -s)" in
+   Linux)
+     blhost_path=linux/amd64
+     ;;
+   Darwin)
+     blhost_path=mac
+     ;;
+   *)
+     echo 'Your operating system is not supported.'
+     exit 1
+     ;;
+esac
+
+blhost="../../../lib/bootloader/bin/Tools/blhost/$blhost_path/blhost --usb 0x1d50,0x6121 --buspal i2c,0x10,100k"
+
+set -x # echo on
+
+#if [ ! -f $usb_binding ]; then
+#   cd $usb_dir
+#   npm install
+#fi
+
+$usb_dir/jump-to-slave-bootloader.js
+$usb_dir/jump-to-bootloader.js buspal
+sleep 1
+$blhost get-property 1
+$blhost flash-erase-all-unsecure
+$blhost write-memory 0x0 uhk-left-release-srec/uhk-left.bin
+$blhost reset
+../../../lib/bootloader/bin/Tools/blhost/$blhost_path/blhost --usb 0x1d50,0x6121 reset