diff --git a/README.md b/README.md
index fa4b549..f73c616 100644
--- a/README.md
+++ b/README.md
@@ -13,6 +13,8 @@ run_embark
 Note that the `run_embark demo` command will create an `embark_demo` directory in
 the docker host's `$PWD`.
 
+Note if you're a macOS user and see `ERROR: this script requires Bash version >= 4.0`, please follow our [Bash upgrade instructions](./macOS-bash4-upgragde.md).
+
 ## Usage via `run.sh`
 
 [`run.sh`](https://github.com/embark-framework/embark-docker/blob/master/run.sh)
diff --git a/macOS-bash4-upgragde.md b/macOS-bash4-upgragde.md
new file mode 100644
index 0000000..8cc4297
--- /dev/null
+++ b/macOS-bash4-upgragde.md
@@ -0,0 +1,16 @@
+# macOS Bash v4 Upgrade Instructions
+When using the `run_embark <cmd>` commands, you receive the error `ERROR: this script requires Bash version >= 4.0` on macOS, follow the steps below to upgrade bash to v4:
+1. Install HomeBrew (if not already installed):
+`ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"`
+2. Update HomeBrew packet database and install bash:
+`brew update && brew install bash`
+3. Change your application to use the correct shell. For example, in Terminal, open Preferences, then change *Shells open with:* to `/usr/local/bin/bash`:
+![Terminal preferences](https://i.imgur.com/vDWQfO7.png)
+In iTerm2, change *Preferences > Profiles > (Select profile) > General > Command > Command* to `/usr/local/bin/bash`:
+![iTerm2 preferences](https://i.imgur.com/zUZE663.png)
+4. `bash --version` should show version 4+:
+`$ bash --version`
+`GNU bash, version 4.4.23(1)-release (x86_64-apple-darwin17.5.0)
+Copyright (C) 2016 Free Software Foundation, Inc.
+License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>`
+5. There is a [guide to upgrading to bash 4 in macOS](http://clubmate.fi/upgrade-to-bash-4-in-mac-os-x/) if you need more help.
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