fix: USB-JTAG-Serial PID detection error

esptool/loader.py

@@ -494,12 +494,14 @@ def _get_pid(self):
         if active_port.startswith("/dev/") and os.path.islink(active_port):
             active_port = os.path.realpath(active_port)
 
+        active_ports = [active_port]
+
         # The "cu" (call-up) device has to be used for outgoing communication on MacOS
         if sys.platform == "darwin" and "tty" in active_port:
-            active_port = [active_port, active_port.replace("tty", "cu")]
+            active_ports.append(active_port.replace("tty", "cu"))
         ports = list_ports.comports()
         for p in ports:
-            if p.device in active_port:
+            if p.device in active_ports:
                 return p.pid
         print(
             "\nFailed to get PID of a device on {}, "