diff --git a/Atom-instructions.md b/Atom-instructions.md
index 319e0c1..2bfd1d4 100644
--- a/Atom-instructions.md
+++ b/Atom-instructions.md
@@ -2,6 +2,8 @@
 
 To change your font to Fira Code, open Atom's preferences (`cmd+,` on Mac or `ctrl+,` on PC), make sure the "Settings" tab is selected, or the "Editor" in Atom 1.10, and scroll down to "Editor Settings". In the "Font Family" field, enter `Fira Code`. If you wish to specify a font weight, remove all spaces from the font name and specify the weight following a hyphen (e.g. `FiraCode-Light`).
 
+Note: on OS X, you may have to manually download and unzip the .ttf files into `Library/Fonts`, and then specify `FiraCode-Light` in Atom.
+
 ## Ligatures
 
 Ligatures are enabled by default in Atom 1.9 and above.