mac os x svn 出现Can't move '.svn/tmp/entries' to '.svn/entries'错误

环境:
从windows的svn wc拷贝到mac  os x下调用svn update

出现错误:
Can't move '.svn/tmp/entries' to '.svn/entries'

解决办法:
cd working folder
chflags -R nouchg ./