I have a new Dell W10 computer running iTunes 12.3.3. I use it as my workhorse computer for all major work. My wife and I have a large collection of CDs (yes we are old fashioned) and nearly all my music in the Dell iTunes is from those CDs, ripped into the Dell computer.
I also have a MacBook Pro running OS X 10.11.4 and iTunes 12.3.3. When I want to update the iTunes library on the Mac I go to the File Explorer on the PC, expand the Libraries Folder, expand the Music folder, and copy the iTunes folder in its entirety to a large flash drive. Then I delete the iTunes folder on the Mac (Finder > Music > iTunes) and paste the iTunes folder from the PC. I have never had an issue doing this, even across different platforms, and I am able to play and sync my ripped CD music in both the PC and Mac. Hope this helps you as well.