From d83e3fddb0aeebc862ee602754abc0a408ea6b65 Mon Sep 17 00:00:00 2001
From: Koichi Shiraishi <zchee.io@gmail.com>
Date: Fri, 12 Jan 2018 00:52:10 +0900
Subject: [PATCH] Add install 'optipng' description because logo/make.py
 depends 'optipng'

---
 README.asciidoc | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/README.asciidoc b/README.asciidoc
index 6e4c38183..f36d2bae9 100644
--- a/README.asciidoc
+++ b/README.asciidoc
@@ -431,7 +431,12 @@ the approach using ligatures.
 
 === How do I build kitty.app on macOS?
 
-Run:
+At first, install `optipng` command via:
+```
+brew install optipng
+```
+
+And run:
 ```
 logo/make.py
 ./setup.py kitty.app