You need to use Iphoto import plugin to import from iphoto library.
Go to file menu in Lightroom > Plugin extras > import from iphoto
Refer this article : Aperture Import plug-in for Lightroom FAQ
I have the latest version of Lightroom CC which already includes the plugin, which is active. I can see how to import my whole Photos Library, but I only want to import a few photos.
When I attempt to import from my Mac Hard drive, the photos library is not visible. I am sure others with Macs have this issue, but I cannot find any help discussions or documentation on this topic
Iphoto library would not be available when you choose to import from Mac hard drive. That is the expected behaviour.
If you want to import few images, you need to first export those images from Iphoto Library > save them on your hard drive and then, import in Lightroom.