Official Apple Updates For Bash
|OS X bash Update 1.0 – OS X Mavericks|
|OS X bash Update 1.0 – OS X Lion|
|OS X bash Update 1.0 – OS X Mountain Lion|
Alternative to Apple Bash
Warning: proceed with caution. This is for advanced users. This will involve manipulating system files.
First, check which version of bash your Mac is running and if it is not 4.3.x then proceed:
First you’ll need to install homebrew,