Add monitor & upload for mac (commented out)

platformio.ini

@@ -9,7 +9,7 @@
 ; https://docs.platformio.org/page/projectconf.html
 
 [platformio]
-default_envs = tbeam
+;default_envs = tbeam
 ;default_envs = tbeam0.7
 ;default_envs = heltec-v2.0
 ;default_envs = tlora-v1
@@ -120,11 +120,11 @@ platform_packages =
     framework-arduinoespressif32@https://github.com/meshtastic/arduino-esp32.git#4cde0f5d412d2695184f32e8a47e9bea57b45276
 
 ; leave this commented out to avoid breaking Windows
-;upload_port = /dev/ttyUSB0
+upload_port = /dev/ttyUSB0
 ;monitor_port = /dev/ttyUSB0
 
-upload_port = /dev/cu.SLAB_USBtoUART
-monitor_port = /dev/cu.SLAB_USBtoUART
+;upload_port = /dev/cu.SLAB_USBtoUART
+;monitor_port = /dev/cu.SLAB_USBtoUART
 
 ; customize the partition table
 ; http://docs.platformio.org/en/latest/platforms/espressif32.html#partition-tables