I don’t use a MAC so I can’t really help. Hopefully some here will give you good advice there. Still I recommend BitPerfect based on other’s experience and emails I’ve done with the developers. In addition to the DSD sections in their manual (http://bitperfectsound.blogspot.com/p/manual.html) I suspect that you might be able to glean some more good information from their web site since they do a lot of DSD testing with the DirectStream.
I use multiple ways. I have an Oppo BDP-103 with an Audiopraise Vanity HD card for playing multichannel SACDs (it can also theoretically play from USB, do various kinds of streaming, etc. I just us it for SACDs.)
Here’s what I wrote before I remembered that you were asking about playing on a MAC, but I don’t recommend my Windows methods for the week of heart:
JRiver bugs the crap out of me: it should be simpler to use and look better than foobar2000, but from release to release DSD breaks in various ways - still it works great for many people.
I use dBpoweramp (for ripping and initial tagging) + mp3tag + Picard for tagging everything except SACD isos.
(Tho it’s not real yet you might like to look at foobar2000 mobile: http://mobile.foobar2000.com/)
For playing (and misc tag cleanups) I use foobar2000 (http://www.foobar2000.org/) which is nerdware and very boring in it’s default initialization. I found that fooRazor (http://br3tt.deviantart.com/art/fooRazor-303120391) is preconfigured enough to do reasonable things and it formed a much better base for me to start tweaking the UI. Of course you still need to set up DSD: See “How to play DSD files on Foobar” in the How To section of the “Resources” here.
The foobar2000 sacd addon allows you to treat SACD isos just like a set of .dsf or .dff files - in particular it supports tagging and hence any tagging you can do with foobar2000 addons (Discogs, MusicBrainz, cddb, etc.) and people have differing experience with .iso’s: http://www.psaudio.com/forum/dsd-1/isos-vs-dff-or-dsf/ JRiver supports tagging tracks of an ISO but it can’t store those tags on the disk alongside the iso (or at least it couldn’t last time I looked.)