system PATH
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On command
`echo $PATH` are displayed these paths by default. Each path is separated by colon and specificaly these are stored in etc/paths file.

`/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin`

add PATH
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`cd` or `cd ~` takes you to home directory

`sudo nano ~/.profile` opens hidden file ".profile" in Terminal editor

type `export PATH="/Applications/Blender/blender.app/Contents/MacOS:$PATH"` 

and save it (Ctrl+x). That's all

___
**Note 1:** After XQuartz installation (needed to run Inkscape) you can see on `echo $PATH` also `/opt/X11/bin` path that is located in etc/paths.d/40XQuartz file. So, if you close and open a new Shell (Terminal window) you should see these path on `echo $PATH` command like this

`/Applications/Blender/blender.app/Contents/MacOS:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin`

**Note 2:** You can add PATH also by editing ".profile" file from Finder. Let "Show hidden files" with Cmd+Shift+. Go to Macintosh HD > Users > "youraccount" folder and open ".profile" file in TextEdit and copy paste
`export PATH="/Applications/Blender/blender.app/Contents/MacOS:$PATH"` and save it. If you open a new Shell you can see the path on `echo $PATH` command.

**Note 3:** I saw paths are stored in other files like .bash_profile (written like `/Applications/Blender/blender.app/Contents/MacOS` on separate line), but since I already created [alias][1] for blender, it make sence to me store also this PATH in one file. I noticed some apps generated already `export PATH="...:$PATH"` command to `~/.profile` so I just mimic that command for blender and it worked. So I hope it's correct :)








  [1]: https://blender.stackexchange.com/a/2160/2214