From 42be8bc8e22a5e6abd90477b79a32f3b11d6ddf3 Mon Sep 17 00:00:00 2001
From: Bevan Kay <email@bevankay.me>
Date: Tue, 13 Dec 2022 22:27:10 +1100
Subject: [PATCH] birdfont: convert to `on_system` blocks

---
 Casks/birdfont.rb | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Casks/birdfont.rb b/Casks/birdfont.rb
index b2365b65bde9b..a8521648b3adf 100644
--- a/Casks/birdfont.rb
+++ b/Casks/birdfont.rb
@@ -1,5 +1,5 @@
 cask "birdfont" do
-  if MacOS.version <= :mojave
+  on_mojave :or_older do
     version "4.17.0"
     sha256 "74c778e3b7598a66b9ddb11b189ba6a21d68263fb0499a965dcedd0ac987b051"
 
@@ -7,7 +7,8 @@
       url "https://birdfont.org/purchase.php"
       regex(%r{Mac\s*OS\s*10\.12.*?/birdfont[._-]v?(\d+(?:\.\d+)+)[._-]free\.dmg}i)
     end
-  else
+  end
+  on_catalina :or_newer do
     version "4.31.4"
     sha256 "2eb96618ba468ff27173d9c327c3818b4c2147f7d483bfe5919d91abb39580aa"