Edit the SystemVersion.plist file to change your Mac OS X version from 10.7 to 10.6:
sudo vi /System/Library/CoreServices/SystemVersion.plistReplace each occurrence of 10.7 with 10.6Save the fileInstall Universal Subversion 1.6.17 Binaries for Snow Leopard (Mac OS X 10.6) from http://www.collab.net/downloads/community/Revert the file we edited previously (10.6 to 10.7 this time)
UPDATE: openCollabNet has finally release the Mac OS X Lion binaries. You can download them here: http://www.open.collab.net/downloads/community/