What equivalents are there to TortoiseSVN, on Mac OSX?
My previous version of this answer had links, that kept becoming dead.
So, I've pointed it to the internet archive to preserve the original answer.
Subversion client releases for Windows and Macintosh
Wiki - Subversion clients comparison table
i use "Versions", quite easy, but not free .
http://versionsapp.com/
Have a look at this archived question: TortoiseSVN for Mac? at superuser. (Original question was removed, so only archive remains.)
Have a look at this page for more likely up to date alternatives to TortoiseSVN for Mac: Alternative to: TortoiseSVN