Roon, Rotel DAC and native DSD?

Im planning to purchase the Rotel 1590 amplifier with DAC which states on mac os X, DSD will play as DoP. I know this has been an OS X issue, but given Room plays DSD on macs, is it still limited to DoP?

Am I better off using a PC?

Mac Os will only do DoP. If you want native DSD, then a PC with the appropriate drivers will do that.