diff --git a/source/os/src/osSemaphore.c b/source/os/src/osSemaphore.c
index 8cc6f0ef2e2b436624cc961315e3ecff6db7691b..5baba5af1e8051afd06b6f188795fb7c26e99a7e 100644
--- a/source/os/src/osSemaphore.c
+++ b/source/os/src/osSemaphore.c
@@ -400,6 +400,9 @@ int tsem_init(tsem_t *psem, int flags, unsigned int count) {
 }
 
 int tsem_destroy(tsem_t *psem) {
+  if (psem == NULL || *psem == NULL) return -1;
+  dispatch_release(*psem);
+  *psem = NULL;
   return 0;
 }
 
@@ -421,13 +424,7 @@ int tsem_timewait(tsem_t *psem, int64_t nanosecs) {
   return 0;
 }
 
-bool taosCheckPthreadValid(TdThread thread) {
-  int32_t ret = taosThreadKill(thread, 0);
-  if (ret == ESRCH) return false;
-  if (ret == EINVAL) return false;
-  // alive
-  return true;
-}
+bool taosCheckPthreadValid(TdThread thread) { return thread != 0; }
 
 int64_t taosGetSelfPthreadId() {
   TdThread thread = taosThreadSelf();
diff --git a/source/os/src/osSysinfo.c b/source/os/src/osSysinfo.c
index 19e9568bbebf20a74e5f316bb50056efa4786c1a..6867c1373bdb03ad63c3001291feaad468090dea 100644
--- a/source/os/src/osSysinfo.c
+++ b/source/os/src/osSysinfo.c
@@ -344,30 +344,27 @@ int32_t taosGetCpuInfo(char *cpuModel, int32_t maxLen, float *numOfCores) {
   *numOfCores = si.dwNumberOfProcessors;
   return 0;
 #elif defined(_TD_DARWIN_64)
-  char   *line = NULL;
-  size_t  size = 0;
+  char    buf[16];
   int32_t done = 0;
   int32_t code = -1;
 
-  TdFilePtr pFile = taosOpenFile("/proc/cpuinfo", TD_FILE_READ | TD_FILE_STREAM);
-  if (pFile == NULL) return false;
-
-  while (done != 3 && (size = taosGetLineFile(pFile, &line)) != -1) {
-    line[size - 1] = '\0';
-    if (((done & 1) == 0) && strncmp(line, "model name", 10) == 0) {
-      const char *v = strchr(line, ':') + 2;
-      tstrncpy(cpuModel, v, maxLen);
-      code = 0;
-      done |= 1;
-    } else if (((done & 2) == 0) && strncmp(line, "cpu cores", 9) == 0) {
-      const char *v = strchr(line, ':') + 2;
-      *numOfCores = atof(v);
-      done |= 2;
-    }
+  TdCmdPtr pCmd = taosOpenCmd("sysctl -n machdep.cpu.brand_string");
+  if (pCmd == NULL) return code;
+  if (taosGetsCmd(pCmd, maxLen, cpuModel) > 0) {
+    code = 0;
+    done |= 1;
   }
+  taosCloseCmd(&pCmd);
 
-  if (line != NULL) taosMemoryFree(line);
-  taosCloseFile(&pFile);
+  pCmd = taosOpenCmd("sysctl -n machdep.cpu.core_count");
+  if (pCmd == NULL) return code;
+  memset(buf, 0, sizeof(buf));
+  if (taosGetsCmd(pCmd, maxLen, cpuModel) > 0) {
+    code = 0;
+    done |= 2;
+    *numOfCores = atof(buf);
+  }
+  taosCloseCmd(&pCmd);
 
   return code;
 #else
diff --git a/tests/system-test/0-others/taosShellNetChk.py b/tests/system-test/0-others/taosShellNetChk.py
index dd44852d4902e7d444e9aebc52fa3b4bb186fc08..80f6a6bc3007bdb2f5a2dfaca2b0fe71d9ea2042 100644
--- a/tests/system-test/0-others/taosShellNetChk.py
+++ b/tests/system-test/0-others/taosShellNetChk.py
@@ -231,7 +231,7 @@ class TDTestCase:
             if platform.system().lower() == 'windows':
                 os.system('ps -a | grep taos | awk \'{print $2}\' | xargs kill -9')
             else:
-                os.system('pkill taos')
+                os.system('pkill -9 taos')
 
     def stop(self):
         tdSql.close()
diff --git a/tests/system-test/1-insert/mutil_stage.py b/tests/system-test/1-insert/mutil_stage.py
index 764da1f166cb9bf149002aae27fc6d7c078be446..63317e8036b6455984231bf634b23f7238935642 100644
--- a/tests/system-test/1-insert/mutil_stage.py
+++ b/tests/system-test/1-insert/mutil_stage.py
@@ -1,4 +1,5 @@
 from datetime import datetime
+from platform import platform
 import time
 
 from typing import List, Any, Tuple
@@ -83,6 +84,8 @@ class TDTestCase:
 
     def del_old_datadir(self, filename):
         cmd = f"sed -i '/^dataDir/d' {filename}"
+        if platform.system().lower() == 'darwin':
+            cmd = f"sed -i '' '/^dataDir/d' {filename}"
         if os.system(cmd) != 0:
             tdLog.exit(cmd)