Q: How do I rename a Photos Library?

Locate the library in your /Home/Pictures/ folder and rename it as you rename any file. Photos opens a default library named Photos.library. You will need to point Photos to the desired library then use Photos preferences to set it as the "system library." Alternatively, hold down the OPTION key then start Photos. A file dialog will appear asking you to select the library you want to open and use.

Quit Photos and then in the finder select the Photos library you want to rename - rename it adn double click on it to open it

Since you do not want to use this library with iCLoud Photo Library further action is required

LN

You are welcome

LN