diff --git a/scripts/engine.cm b/scripts/engine.cm
index 3a096911..9105b0d3 100644
--- a/scripts/engine.cm
+++ b/scripts/engine.cm
@@ -684,6 +684,8 @@ function guid(bits = 256)
 {
   var guid = new blob(bits, os.random)
   stone(guid)
+  log.console(os.random())
+  log.console("guid: " + text(guid,'h'))
   return text(guid,'h')
 }
 
diff --git a/scripts/os.c b/scripts/os.c
index c2bdd803..63265bec 100644
--- a/scripts/os.c
+++ b/scripts/os.c
@@ -1,7 +1,5 @@
 #include "cell.h"
 
-#include <SDL3/SDL.h>
-#include <sys/time.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
@@ -10,6 +8,7 @@
 #include <time.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/sysctl.h>
 
 #ifdef _WIN32
 #include <windows.h>
@@ -47,34 +46,91 @@ static JSClassDef js_dylib_class = {
   .finalizer = js_dylib_finalizer,
 };
 
-JSC_CCALL(os_now, return number2js(js, (double)SDL_GetTicksNS()/1000000000.0))
+#include <mach/mach_time.h>
+
+JSC_CCALL(os_now,
+#ifdef _WIN32
+  LARGE_INTEGER frequency, counter;
+  QueryPerformanceFrequency(&frequency);
+  QueryPerformanceCounter(&counter);
+  return number2js(js, (double)counter.QuadPart / (double)frequency.QuadPart);
+#elif defined(__APPLE__)
+  static mach_timebase_info_data_t timebase = {0, 0};
+  if (timebase.denom == 0) {
+    mach_timebase_info(&timebase);
+  }
+  uint64_t time = mach_absolute_time();
+  return number2js(js, (double)time * timebase.numer / timebase.denom / 1000000000.0);
+#else
+  struct timespec ts;
+  clock_gettime(CLOCK_MONOTONIC, &ts);
+  return number2js(js, (double)ts.tv_sec + (double)ts.tv_nsec / 1000000000.0);
+#endif
+)
 
 JSC_CCALL(os_sleep,
   double secs = js2number(js,argv[0]);
-  int ms = secs*1000;
-  SDL_Delay(ms);
+#ifdef _WIN32
+  Sleep((DWORD)(secs * 1000));
+#else
+  struct timespec ts;
+  ts.tv_sec = (time_t)secs;
+  ts.tv_nsec = (long)((secs - ts.tv_sec) * 1000000000);
+  nanosleep(&ts, NULL);
+#endif
 )
 
-JSC_CCALL(os_power_state,
-  int pct, secs;
-  SDL_PowerState state = SDL_GetPowerInfo(&secs, &pct);
-  const char *statestr = "unknown";
-  switch(state) {
-    case SDL_POWERSTATE_ON_BATTERY: statestr = "battery"; break;
-    case SDL_POWERSTATE_NO_BATTERY: statestr = "no battery"; break;
-    case SDL_POWERSTATE_CHARGING: statestr = "charging"; break;
-    case SDL_POWERSTATE_CHARGED: statestr = "charged"; break;
-    case SDL_POWERSTATE_ERROR: statestr = "error"; break;
-    case SDL_POWERSTATE_UNKNOWN: statestr = "unknown"; break;
-  }
-  ret = JS_NewObject(js);
-  JS_SetPropertyStr(js,ret,"state",JS_NewString(js,statestr));
-  JS_SetPropertyStr(js,ret,"percent",number2js(js,pct));
-  JS_SetPropertyStr(js,ret,"seconds",number2js(js,secs));
-)
+static JSValue js_os_totalmem(JSContext *js, JSValue self, int argc, JSValue *argv) {
+  JSValue ret = JS_NULL;
+#ifdef _WIN32
+  MEMORYSTATUSEX statex;
+  statex.dwLength = sizeof(statex);
+  if (!GlobalMemoryStatusEx(&statex)) return JS_ThrowInternalError(js,"GlobalMemoryStatusEx failed");
+  return JS_NewInt64(js,(int64_t)(statex.ullTotalPhys / (1024 * 1024)));
+#elif defined(__linux__)
+  struct sysinfo info;
+  if (sysinfo(&info) == 0)
+    return JS_NewInt64(js,(int64_t)((info.totalram * info.mem_unit) / (1024 * 1024)));
+  return JS_NewInt64(js,0);
+#elif defined(__APPLE__)
+  int mib[2] = {CTL_HW, HW_MEMSIZE};
+  int64_t memsize;
+  size_t len = sizeof(memsize);
+  if (sysctl(mib, 2, &memsize, &len, NULL, 0) == 0)
+    return JS_NewInt64(js, memsize / (1024 * 1024));
+  return JS_NewInt64(js,0);
+#else
+  long pages = sysconf(_SC_PHYS_PAGES);
+  long page_size = sysconf(_SC_PAGE_SIZE);
+  if (pages < 0 || page_size < 0) return JS_NewInt64(js,0);
+  return JS_NewInt64(js,(int64_t)((pages * page_size) / (1024 * 1024)));
+#endif
+  return ret;
+}
 
-JSC_CCALL(os_totalmem, return number2js(js, SDL_GetSystemRAM()))
-JSC_CCALL(os_platform, return JS_NewString(js,SDL_GetPlatform()))
+static JSValue js_os_platform(JSContext *js, JSValue self, int argc, JSValue *argv) {
+  JSValue ret = JS_NULL;
+#ifdef _WIN32
+  return JS_NewString(js,"Windows");
+#elif defined(__linux__)
+  return JS_NewString(js,"Linux");
+#elif defined(__APPLE__)
+  #ifdef TARGET_OS_IPHONE
+    return JS_NewString(js,"iOS");
+  #else
+    return JS_NewString(js,"macOS");
+  #endif
+#elif defined(__FreeBSD__)
+  return JS_NewString(js,"FreeBSD");
+#elif defined(__OpenBSD__)
+  return JS_NewString(js,"OpenBSD");
+#elif defined(__NetBSD__)
+  return JS_NewString(js,"NetBSD");
+#else
+  return JS_NewString(js,"Unknown");
+#endif
+  return ret;
+}
 
 static JSValue js_os_hostname(JSContext *js, JSValue self, int argc, JSValue *argv) {
   JSValue ret = JS_NULL;
@@ -447,7 +503,7 @@ JSC_CCALL(os_random,
   if (randombytes(buf, sizeof(double)) != 0) {
     return JS_ThrowInternalError(js, "failed to generate random bytes");
   }
-  return JS_NewFloat64(js, random_double);
+  return JS_NewInt32(js, random_double);
 )
 
 static const JSCFunctionListEntry js_os_funcs[] = {
@@ -458,7 +514,6 @@ static const JSCFunctionListEntry js_os_funcs[] = {
   MIST_FUNC_DEF(os, hostname, 0),
   MIST_FUNC_DEF(os, version, 0),
   MIST_FUNC_DEF(os, now, 0),
-  MIST_FUNC_DEF(os, power_state, 0),
   MIST_FUNC_DEF(os, rusage, 0),
   MIST_FUNC_DEF(os, mallinfo, 0),
   MIST_FUNC_DEF(os, buffer2string, 1),
diff --git a/tests/send.ce b/tests/send.ce
index 8770c45c..edbfe45b 100644
--- a/tests/send.ce
+++ b/tests/send.ce
@@ -3,4 +3,4 @@ $_.start(e => {
     log.console(`Original sender got message back: ${json.encode(msg)}. Stopping!`)
     $_.stop()
   })
-}, "reply")
+}, "tests/reply")