diff --git a/src/cmd/moby/main.go b/src/cmd/moby/main.go
index 739ec1662..8496624bc 100644
--- a/src/cmd/moby/main.go
+++ b/src/cmd/moby/main.go
@@ -40,23 +40,6 @@ func main() {
 	flagQuiet := flag.Bool("q", false, "Quiet execution")
 	flagVerbose := flag.Bool("v", false, "Verbose execution")
 
-	runCmd := flag.NewFlagSet("run", flag.ExitOnError)
-	runCmd.Usage = func() {
-		fmt.Printf("USAGE: %s run [options] [prefix]\n\n", os.Args[0])
-		fmt.Printf("'prefix' specifies the path to the VM image.\n")
-		fmt.Printf("It defaults to './moby'.\n")
-		fmt.Printf("\n")
-		fmt.Printf("Options:\n")
-		runCmd.PrintDefaults()
-		fmt.Printf("\n")
-		fmt.Printf("If 'data' is supplied or if 'background' is selected\n")
-		fmt.Printf("some per VM state is kept in a sub-directory in the ~/.moby\n")
-	}
-	runCPUs := runCmd.Int("cpus", 1, "Number of CPUs")
-	runMem := runCmd.Int("mem", 1024, "Amount of memory in MB")
-	runDiskSz := runCmd.Int("disk-size", 0, "Size of Disk in MB")
-	runDisk := runCmd.String("disk", "", "Path to disk image to used")
-
 	// Set up logging
 	log.SetFormatter(new(infoFormatter))
 	log.SetLevel(log.InfoLevel)
@@ -85,8 +68,7 @@ func main() {
 	case "build":
 		build(args[1:])
 	case "run":
-		runCmd.Parse(args[1:])
-		run(*runCPUs, *runMem, *runDiskSz, *runDisk, runCmd.Args())
+		run(args[1:])
 	case "help":
 		flag.Usage()
 	default:
diff --git a/src/cmd/moby/run_darwin.go b/src/cmd/moby/run_darwin.go
index 1c28a05e6..9b4ac486e 100644
--- a/src/cmd/moby/run_darwin.go
+++ b/src/cmd/moby/run_darwin.go
@@ -3,20 +3,43 @@
 package main
 
 import (
+	"flag"
+	"fmt"
 	"io/ioutil"
 	"os"
-	"os/user"
 
 	log "github.com/Sirupsen/logrus"
 	"github.com/docker/hyperkit/go"
 )
 
-func run(cpus, mem, diskSz int, disk string, args []string) {
+// Process the run arguments and execute run
+func run(args []string) {
+	runCmd := flag.NewFlagSet("run", flag.ExitOnError)
+	runCmd.Usage = func() {
+		fmt.Printf("USAGE: %s run [options] [prefix]\n\n", os.Args[0])
+		fmt.Printf("'prefix' specifies the path to the VM image.\n")
+		fmt.Printf("It defaults to './moby'.\n")
+		fmt.Printf("\n")
+		fmt.Printf("Options:\n")
+		runCmd.PrintDefaults()
+	}
+	runCPUs := runCmd.Int("cpus", 1, "Number of CPUs")
+	runMem := runCmd.Int("mem", 1024, "Amount of memory in MB")
+	runDiskSz := runCmd.Int("disk-size", 0, "Size of Disk in MB")
+	runDisk := runCmd.String("disk", "", "Path to disk image to used")
+
+	runCmd.Parse(args)
+	remArgs := runCmd.Args()
+
 	prefix := "moby"
-	if len(args) > 0 {
-		prefix = args[0]
+	if len(remArgs) > 0 {
+		prefix = remArgs[0]
 	}
 
+	runInternal(*runCPUs, *runMem, *runDiskSz, *runDisk, prefix)
+}
+
+func runInternal(cpus, mem, diskSz int, disk, prefix string) {
 	cmdline, err := ioutil.ReadFile(prefix + "-cmdline")
 	if err != nil {
 		log.Fatalf("Cannot open cmdline file: %v", err)
@@ -42,10 +65,3 @@ func run(cpus, mem, diskSz int, disk string, args []string) {
 		log.Fatalf("Cannot run hyperkit: %v", err)
 	}
 }
-
-func getHome() string {
-	if usr, err := user.Current(); err == nil {
-		return usr.HomeDir
-	}
-	return os.Getenv("HOME")
-}
diff --git a/src/cmd/moby/run_fallback.go b/src/cmd/moby/run_fallback.go
index 65402e4a9..d15f6922a 100644
--- a/src/cmd/moby/run_fallback.go
+++ b/src/cmd/moby/run_fallback.go
@@ -6,6 +6,6 @@ import (
 	log "github.com/Sirupsen/logrus"
 )
 
-func run(cpus, mem, diskSz int, userData string, args []string) {
+func run(args []string) {
 	log.Fatalf("'run' is not supported yet on your OS")
 }