No importing needed!!
In Lightroom, use the command File > Upgrade Photoshop Elements Catalog.
What I meant was "how do I import my photos from Windows Photoshop Elements 12" to "the newest LightRoom on a new Mac OS." Can I keep all categorizations? Will I lose tags and albums? Will I lose face recognition categorization?
I never did it from Windows to Mac.
I assume you need to move everything to Mac PSE12 (or PSE 13) by downloading the 30 day free trial of PSE 12 or 13, and then once everything is working, use File->Upgrade Photoshop Elements Catalog in Lightroom. Your tags and albums will remain intact. I believe the face recognition transfers as well to keywords, but the location in the photo of the face will be gone as Lightroom has no such feature.