在我的Mac上安装postgres 10时遇到问题，版本10.12.5。
我尝试过安装两种方式：
(1) Downloading Postgres.app
(2) `brew install postgresql`
并尝试为initdb手动运行这些命令的一系列变体：
$ initdb /Applications/Postgres.app/Contents/Versions/latest/bin/ver-10
$ initdb /usr/local/var/postgres -E utf8
所有产生相同的错误FATAL: could not create semaphores: Invalid argument。
完整追踪：
The files belonging to this database system will be owned by user "foo".
This user must also own the server process.
The database cluster will be initialized with locale "en_US.UTF-8".
The default text search configuration will be set to "english".
Data page checksums are disabled.
fixing permissions on existing directory /usr/local/var/postgres ... ok
creating subdirectories ... ok
selecting default max_connections ... 10
selecting default shared_buffers ... 400kB
selecting dynamic shared memory implementation ... posix
creating configuration files ... ok
running bootstrap script ... 2018-03-12 20:49:58.654 PDT [98144] FATAL: could not create semaphores: Invalid argument
2018-03-12 20:49:58.654 PDT [98144] DETAIL: Failed system call was semget(1, 17, 03600).
child process exited with exit code 1
initdb: removing contents of data directory "/usr/local/var/postgres"
我不确定FATAL: could not create semaphores: Invalid argument是什么意思。我已经看到很多其他与空间不足相关的答案，但不是这个。
提前致谢！