The MS remote desktop client is pretty good. No issues there that I've seen.
As far as the core Subversion applications go, whilst nicely compiled binaries aren't made available for OS X on the tigris.org site, plenty of other people do the work with the source so you don't have to. Notably, Martin Ott (of SubEthaEdit
As for Subversion from the client perspective on the Mac, there is a Finder "add-in" which gives you functionality akin to TortoiseSVN on Windows (if you're familiar with that), i.e. contextual menu items covering things like check in, check out, etc.
Xcode supports Subversion, and of course you can also use Subversion with Eclipse via the Subclipse plugin.
Summary of URLs: Martin Ott's site Subversion site Subclipse SCPlugin for OS X
Hope that helps.