diff --git a/README.md b/README.md
index f4dd6f285926e5a50936720ecd795bff832c14ef..205c1e2983eb12ab1d897faf17dcac94ef01450e 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,12 @@ Click the appropriate link to download and install the ARM GCC compiler here for
 
 The download may take 30 seconds to a minute. Open the downloaded software and follow the instructions in the installer.
 
+On _macOS_, after the software install is complete, run these two commands to add the toolchain to the system PATH:
+```
+echo 'export PATH="/Applications/ARM/bin/arm-none-eabi-gcc"' >> ~/.zshrc
+source ~/.zshrc
+```
+
 ## Make
 We will now install the last dependency for this project called Make, which allows us to easily build a binary file for the keychain.