CP2102 device is not listed in /dev on macOS 10.13

I found that macOS High Sierra has blocked all unsigned / unmanaged kernel extensions and the SiLabs kernel extension guide doesn’t have information on how to manually enable the required extensions.

An excellent overview of this process is at man blogs - here is one such guide:

• https://grahamgilbert.com/blog/2017/09/11/enabling-kernel-extensions-in-high-sierra/

Here are steps to allow this extension specifically:

1. Go to "System Preferences" -> "Security & Privacy"
2. In the bottom of the window, you will see a message "System software from developer "SiLabs" was blocked from loading."
3. Click on "Allow" button
4. Restart your Mac

Now my device is listed as /dev/cu.SLAB_USBtoUART and everything work as expected.