I have seen this instruction for hiding the Finder icon from MacOS:
https://github.com/jesscXC/hide-finder-trash-dock-icons
However, it doesn't seem to work on MacOS Sierra because the DockMenus.plist file seems to be locked and cannot be changed. Is there any other way to do this on Sierra?
Best Answer
I found the answer while playing with Path Finder's preferences and finding this option: "Enable Finder's "Remove from Dock" menu option. Upon clicking on it, I got the following message:
To disable SIP, however, you have to enter recovery mode. Here is more information about it on HowToGeek:
https://www.howtogeek.com/230424/how-to-disable-system-integrity-protection-on-a-mac-and-why-you-shouldnt/