diff --git a/server/pse_darwin.go b/server/pse_darwin.go
index 1c0b1728..9e19e3c6 100644
--- a/server/pse_darwin.go
+++ b/server/pse_darwin.go
@@ -1,93 +1,23 @@
-// Copyright 2015 Apcera Inc. All rights reserved.
+// Copyright 2015-2016 Apcera Inc. All rights reserved.
 
 package server
 
-/*
-#include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <sys/sysctl.h>
-#include <mach/task.h>
-#include <mach/mach_init.h>
-#include <mach/mach_port.h>
-#include <mach/thread_act.h>
-#include <mach/vm_map.h>
-#include <libproc.h>
-
-#define TH_USAGE_SCALE 1000
-
-int getusage(double *pcpu, unsigned int *rss, unsigned int *vss)
-{
-    struct task_basic_info t_info;
-    mach_msg_type_number_t t_info_count = TASK_BASIC_INFO_COUNT;
-    task_t task = MACH_PORT_NULL;
-    int ret;
-
-    *rss = *vss = *pcpu = 0;
-    ret = task_for_pid(mach_task_self(), getpid(), &task);
-    if (ret != KERN_SUCCESS) {
-        return ret;
-    }
-    task_info(task, TASK_BASIC_INFO, (task_info_t)&t_info, &t_info_count);
-    *rss = t_info.resident_size;
-    *vss = t_info.virtual_size;
-
-    // Percent CPU Calculations
-
-    thread_port_array_t thread_list;
-    unsigned int        thread_count;
-
-	ret = task_threads(task, &thread_list, &thread_count);
-	if (ret != KERN_SUCCESS) {
-        mach_port_deallocate(mach_task_self(), task);
-		return ret;
-	}
-
-    int j;
-    int cpu_usage;
-    unsigned int thread_info_count = THREAD_BASIC_INFO_COUNT;
-
-    cpu_usage = 0;
-
-	for (j = 0; j < thread_count; j++) {
-		int tstate;
-        int error;
-	    struct thread_basic_info tb;
-
-        thread_info_count = THREAD_BASIC_INFO_COUNT;
-		error = thread_info(thread_list[j], THREAD_BASIC_INFO,
-			 (thread_info_t)&tb, &thread_info_count);
-		if (error != KERN_SUCCESS) {
-			ret=1;
-		}
-		cpu_usage += tb.cpu_usage;
-    }
-	vm_deallocate(mach_task_self(), (vm_address_t)(thread_list),
-		 sizeof(thread_list) * thread_count);
-    mach_port_deallocate(mach_task_self(), task);
-
-    *pcpu = ((double)cpu_usage) * 100.0 / ((double)TH_USAGE_SCALE);
-
-    return 0;
-}
-
-*/
-import "C"
-
 import (
-	"syscall"
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
 )
 
 func procUsage(pcpu *float64, rss, vss *int64) error {
-	var r, v C.uint
-	var c C.double
-
-	if ret := C.getusage(&c, &r, &v); ret != 0 {
-		return syscall.Errno(ret)
+	pidStr := fmt.Sprintf("%d", os.Getpid())
+	out, err := exec.Command("ps", "o", "pcpu=,rss=,vsz=", "-p", pidStr).Output()
+	if err != nil {
+		*rss, *vss = -1, -1
+		return errors.New(fmt.Sprintf("ps call failed:%v", err))
 	}
-	*rss = int64(r)
-	*vss = int64(v)
-	*pcpu = float64(c)
+	fmt.Sscanf(string(out), "%f %d %d", pcpu, rss, vss)
+	*rss *= 1024 // 1k blocks, want bytes.
+	*vss *= 1024 // 1k blocks, want bytes.
 	return nil
 }