How to enable COM3 and COM4 in VMWare

By default only COM1 and COM2 can be enabled for a VM. This site describes the problem better than me: kb.vmware.com/s/article/1002463

However to enable COM3 for a VM you need to do it manually. Open up your VMs .vmx file and add the following lines:

serial2.present = "TRUE"
serial2.fileName = "COM3"
serial2.startConnected = "TRUE"
  • For COM4 you can do the same, just make sure you change serial2 to serial3 and COM3 to COM4.