Working environment OS X EI Capitan 10.11.1
At that time, the version of Apache was 1.7.XX (the terminal can use SVN -version to view the SVN version, is two short-term OH)
As error message Svn:E155021:This client is too old to work with the working copy at ...
Solution:
1. To update the SVN version of the corresponding system, you can jump to https://www.wandisco.com/subversion/download download the corresponding SVN version, (download 1.8.XX is no problem, I use 1.8.15)
2. The installation process is very simple, after the installation, the location will be in/OPT/SUBVERSION/BIN/SVN (do not know the location of the command which SVN to see the current SVN location)
3. After installation, change the. Bash_profile, which is your profile file, placing its path at the front of all paths;
4. After the completion of the/usr/bin/all relevant svn to delete things; This is not very good delete, should be OS 10.XX (the specific version forgot) added a rootless mechanism, must be restarted
Press and hold cmd+r into recovery mode, find the terminal input in the available drop-down list of the status bar above csrutil disable disable rootless and then restart it can be deleted; [2]
5. Restart, in the Terminal input view version of the command, if it is a new version, then OK;
Reference:
[1]http://blog.sina.com.cn/s/blog_a0f3ea980101c0y0.html
[2]http://www.jianshu.com/p/22b89f19afd6
[3]http://redfinsolutions.com/blog/update-subversion-mac-os-x
Use as error under MAC svn:e155021 current SVN version is too low