nrollr

Python environments in macOS

The latest version of macOS 10.13.3 has Python 2.7.10 installed by default, yet Python has been available on macOS and previously OS X for quite a while now.

Consult the Apple's Open Source Reference Library, and browse through the various releases of the OS to find out which Python version was included). But what if you have a project which requires Python 3 ?

The following instructions will guide you through the process of:

• installing Python 3 using Homebrew
• running multiple Python verions as sandboxed environments

sgnl

Outdated note: the process is a lot easier now: after you brew install postgresql you can initialize or stop the daemon with these commands: brew services start postgresql or brew services stop postgresql.

new out put may look like

To have launchd start postgresql now and restart at login:
  brew services start postgresql
Or, if you don't want/need a background service you can just run:
  pg_ctl -D /usr/local/var/postgres start