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Then the env shebang will choose /bin/bash (v3). as an installation script, an AppleScript, or a management system, /usr/local/bin will likely not be part of the PATH in that environment. When you launch the same script in a different context, e.g. from Terminal) will use the newer bash, as /usr/local/bin comes before /bin in the search order.

A script with the shebang #!/usr/bin/env bash launched in the user environment (i.e. However, this renders the actual version of bash that will interpret the script unpredictable.įor example, assume you have bash v5 installed in the default configuration (as /usr/local/bin/bash. using the current PATH) This is useful when the script has to run in various environments where the location of the bash binary is unknown, in other words across multiple Unix and Unix-like platforms. The env command will determine the path to the bash binary in the current environment.

It is often recommended to use the env command in the shebang: #!/usr/bin/env bash This way, the script author can control whether a script is executed by the default bash v3 ( /bin/bash) or the newer bash v5 ( /usr/local/bin/bash or /usr/local/bin/bash5).

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Scripts using bash, should have the full path to the binary in the shebang. Note: the PATH in other contexts will likely not contain /usr/local/bin and further confuse matters. But then other tools such as env (mentioned below) will not find the binary any more. One option to avoid this ambiguity is to rename the binary in /usr/local/bin to bash5. It might lead to some unexpected behavior for some users, though. This might be the setup you want, when you want to use bash v5 always. It will show this in the prompt, but you can also verify the BASH_VERSION. You can test this by showing the BASH_VERSION environment variable: $ echo $BASH_VERSIONīut when you then run bash it will invoke /usr/local/bin/bash, so it will run the new bash v5. Since the default shell has not yet been changed from /bin/bash the Terminal still opens to bash v3. This means, that when a user types bash in to a shell, the version in /usr/local/bin will be preferred over the pre-installed bash v3. The macOS default PATH lists /usr/local/bin before /bin where the default bash v3 binary, also called bash, is located. There is more useful information in the rest of the post, though, so keep reading! How the new and the old bash interactīy default, the bash v5 binary is called bash and will be installed in /usr/local/bin.

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If you were just looking for a way to install bash v5 without brew, you are done! This will build and install the bash binary and supporting files in /usr/local/bin and /usr/local. When make succeeds, you can actually install bash v5 with $ sudo make install There will be some odd looking warnings, but you can ignore those. That’s not where we want it in the end, but it is probably a good idea see if the build process works. This will build the bash binary and the supporting files in the current directory. You can build bash with the make command. The configure process will take a while, there will be plenty of messages showing progress. Open a Terminal window and change directory to the newly expanded bash-5.0 directory. Update: I have a post with some updated instructions to include the patches to bash 5.0.

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Once downloaded, you can expand the archive in Finder by double-clicking. As of this writing the latest version is bash-5.0 and the file you want is bash-5.0.tar.gz. This requires Xcode or the Developer Command Line Tools to be installed.įirst, download the source for the latest bash version from this page.

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In this post, I will show how you can install the latest bash version without brew and how to build an installer package for deployment. Unfortunately, the bash project does not provide one. Ideally, there would be package installer for the latest bash version. brew’s workflows do not scale to large deployments controlled with a management system. brew is designed for single user installation, where the user has administrator privileges. The main challenge with using brew is that it does not work on the scale that MacAdmins require. While you would think this is a common desire, most pages I have found will simply point to Homebrew to download and install a newer bash version. dictionaries) and better auto-completion setup. New features include, among many other things, associated arrays (i.e. However, nothing is keeping you from downloading and installing the latest bash version. Apple does not include GPL v3 licensed tools with macOS. The discrepancy comes from the fact that bash has been licensed as GPL v3 since version 4.

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