Thanks Aj! Finally my Mic is working in PD14 now. BTW, I suggest to rephrase step 3 as:
3a. Start the VM and then change Parallel Desktop Configuration -> Hardware -> Sound -> Input -> MacBook Pro's Mic. Click [OK] in the pop-up message that request for access.
3b. Go to macOS's system preference -> Security and Privacy -> Microphone to enable Parallel Desktop.
Last edited: Oct 11, 2018