The latest xcode (4.6) ships with an older SVN (1.6) and so does osx!
State of the art (as far that can be set for SVN :D) is 1.7
now, when you use some third party tools like Cornerstone SVN they might default to 1.7
1.7 working copies cannot be read/modified with 1.6 and so Xcode will fail to read the history for such working copies.
To upgrade XCode (and if you like, the osx default client):
cd ~/Downloads/ curl -o subversion-latest.tar.gz http://apache.mirrors.tds.net/subversion/subversion-1.7.8.tar.gz tar -xvf subversion-latest.tar.gz
build & install svn (with neon support! for http/https)
cd ~/Downloads/subversion-1.7.* sh get-deps.sh neon cd neon/ ./configure --with-ssl make sudo make install cd .. ./configure --prefix=/usr --with-neon make sudo make install
IF YOU don't want to install it as system default, choose another prefix.. e.g.:
./configure --prefix=/usr/local --with-neon
go into the Xcode bundle and tell it to use the new binaries
cd /Applications/Xcode.app/Contents/Developer/usr/bin/ sudo -s ln -s /usr/bin/svn* ./
IF YOU didn't install it as system default, the path is different depending on the prefix you chose