但是,当我尝试在数据库上创建空间扩展时,我不能,因为Postgres声称无法看到扩展文件：

:~ anna$psql -d land -c "CREATE EXTENSION postgis;"
ERROR:  could not open extension control file 
"/usr/local/Cellar/postgresql/9.3.4/share/postgresql/extension/postgis.control": 
No such file or directory

看起来该文件位于其他位置：

:~ anna$mdfind postgis.control
/usr/local/pgsql-9.3/share/extension/postgis.control

我肯定使用Postgres的预期版本,虽然我不知道这是否是KyngChaos库通常安装的地方：

Annas-MacBook-Air:~ anna$psql --version
psql (Postgresql) 9.3.4
Annas-MacBook-Air:~ anna$which psql
/usr/local/pgsql-9.3/bin/psql

我一直非常小心不使用Homebrew等安装Postgres,因为我知道它会导致同一系统的多个版本出现问题.

任何人都可以建议为什么扩展文件不在预期的位置？

更新：

看起来可能在我的系统上有多个版本的Postgres浮动,而我使用的是错误的版本？

:~ anna$mdfind -name "postgres" | grep -G "postgres$"
/usr/local/pgsql-9.3/bin/postgres
/usr/local/var/postgres
/usr/local/Cellar/postgresql/9.3.4/bin/postgres

我应该使用哪一个,如何设置系统默认使用这个？

进一步更新

这是pg_config的输出：

BINDIR = /usr/local/pgsql-9.3/bin
DOCDIR = /usr/local/pgsql-9.3/share/doc
INCLUDEDIR = /usr/local/pgsql-9.3/include
PKGINCLUDEDIR = /usr/local/pgsql-9.3/include
INCLUDEDIR-SERVER = /usr/local/pgsql-9.3/include/server
LIBDIR = /usr/local/pgsql-9.3/lib
PKGLIBDIR = /usr/local/pgsql-9.3/lib
LOCALEDIR =
MANDIR = /usr/local/pgsql-9.3/man
SHAREDIR = /usr/local/pgsql-9.3/share
SYSCONFDIR = /usr/local/pgsql-9.3/etc
PGXS = /usr/local/pgsql-9.3/lib/pgxs/src/makefiles/pgxs.mk
CONFIGURE = '--with-openssl' '--with-pam' '--with-krb5' '--with-gssapi' '--with-ldap' '--enable-thread-safety' '--with-bonjour' '--with-python' '--without-perl' '--enable-nls' '--with-libxml' 'CC=clang' 'CXX=clang++' 'CFLAGS=-Os -arch x86_64 -isysroot /Developer/SDKs/MacOSX10.7.sdk -D_FILE_OFFSET_BITS=64' 'LD=clang' 'LDLFAGS=-arch x86_64 -isysroot /Developer/SDKs/MacOSX10.7.sdk'
CC = gcc
CPPFLAGS = -I/usr/include/libxml2
CFLAGS = -Os -arch x86_64 -D_FILE_OFFSET_BITS=64 -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -fno-strict-aliasing -fwrapv
CFLAGS_SL =
LDFLAGS = -arch x86_64 -Wl,-dead_strip_dylibs
LDFLAGS_SL =
LIBS = -lintl -liconv -lxml2 -lpam -lssl -lcrypto -lgssapi_krb5 -ledit -lz
VERSION = Postgresql 9.3.4