diff --git a/cmd/control/cli.go b/cmd/control/cli.go
index 9314b672..1ba70fe6 100644
--- a/cmd/control/cli.go
+++ b/cmd/control/cli.go
@@ -24,6 +24,14 @@ func Main() {
 			HideHelp:    true,
 			Subcommands: configSubcommands(),
 		},
+		{
+			Name:            "dev",
+			ShortName:       "d",
+			Usage:           "dev spec",
+			HideHelp:        true,
+			SkipFlagParsing: true,
+			Action:          devAction,
+		},
 		{
 			Name:            "env",
 			ShortName:       "e",
diff --git a/cmd/control/dev.go b/cmd/control/dev.go
new file mode 100644
index 00000000..88d36aff
--- /dev/null
+++ b/cmd/control/dev.go
@@ -0,0 +1,11 @@
+package control
+
+import (
+	"fmt"
+	"github.com/codegangsta/cli"
+	"github.com/rancherio/os/util"
+)
+
+func devAction(c *cli.Context) {
+	fmt.Println(util.ResolveDevice(c.Args()[0]))
+}
diff --git a/scripts/build-common b/scripts/build-common
index d2a85731..9dd3aa73 100644
--- a/scripts/build-common
+++ b/scripts/build-common
@@ -4,6 +4,15 @@
 : ${BUILD:=$(pwd)/build}
 : ${DIST:=$(pwd)/dist}
 
+# PREREQ: brew install coreutils
+path()
+{
+    local UNAME=$(uname)
+    if [ "$UNAME" == "Darwin" ]; then greadlink -f "$1"
+    elif [ "$UNAME" == "Linux" ]; then readlink -f "$1";
+    fi
+}
+
 write_base()
 {
     DOCKER_BASE=${DOCKER_BASE:?"DOCKER_BASE not defined"}
diff --git a/scripts/run b/scripts/run
index 3e2e9459..65ffce08 100755
--- a/scripts/run
+++ b/scripts/run
@@ -26,7 +26,7 @@ while [ "$#" -gt 0 ]; do
             ;;
         --cloud-config)
             shift 1
-            CLOUD_CONFIG=$(readlink -f "$1") || :
+            CLOUD_CONFIG=$(path "$1") || :
             if [ ! -f ${CLOUD_CONFIG} ]; then
                 echo No such file: "'"${CLOUD_CONFIG}"'" 1>&2
                 exit 1
@@ -90,12 +90,19 @@ KERNEL_ARGS="rancher.password=rancher console=ttyS0 ${QEMU_APPEND}"
 
 if [ "$UNAME" == "Darwin" ] && [ -x $(which xhyve) ]; then
 
+    CLOUD_CONFIG_ISO="$(pwd)/cloud-config.iso"
+    rm -rf ${CLOUD_CONFIG_ISO}
+
+    # PREREQ: brew install cdrtools
+    mkisofs -R -V config-2 -o "${CLOUD_CONFIG_ISO}" "$(pwd)/cloud-init"
+
     echo PWD=`pwd`
     exec sudo xhyve -H -P \
-        -m 2G \
+        -m 4G \
         -s 0:0,hostbridge -s 31,lpc \
         -l com1,stdio \
         -s 2:0,virtio-net \
+        -s 3,ahci-cd,${CLOUD_CONFIG_ISO} \
         -U a01fb25c-3a19-4759-a47a-2e353e51807d \
         -f kexec,${KERNEL},${INITRD_TEST},"earlyprintk=serial acpi=off elevator=noop ${KERNEL_ARGS}"
 
diff --git a/scripts/ssh b/scripts/ssh
index d11fc688..30dc486c 100755
--- a/scripts/ssh
+++ b/scripts/ssh
@@ -5,4 +5,12 @@ cd $(dirname $0)/..
 
 chmod 0600 ./assets/rancher.key
 
-exec ssh -p 2222 -F ./assets/scripts_ssh_config -i ./assets/rancher.key rancher@localhost "$@"
+UNAME=$(uname)
+
+if [ "$UNAME" == "Darwin" ]; then
+    HOST=192.168.64.2  #  consult `/var/db/dhcpd_leases` or delete it
+    exec ssh -F ./assets/scripts_ssh_config -i ./assets/rancher.key rancher@${HOST} "$@"
+elif [ "$UNAME" == "Linux" ]; then
+    exec ssh -p 2222 -F ./assets/scripts_ssh_config -i ./assets/rancher.key rancher@localhost "$@"
+fi
+