Hi Eric
I am running Roon on my Mac Pro. The Mac is a late 2013 model (the round/cylinder one) has a SSD and 32 GB of RAM. It is a 3.7 GHz Quad Core Intel Xeon E5. This is connected to my network via ethernet cabling. The NAS is a synology 1512+ and is connected via ethernet cabling to my network.
Currently Roon is set up to seem my music using the iTunes Library link in your Settings / Storage section. Yes - I would like playlists to come through. Every time I restart Roon it takes 20 minutes or so to scan the iTunes files. The Storage tab says the files are imported but it scans the whole lot again and while this is happening Roon is unresponsive to playing music etc. See picture. 
Thanks!