From f874603a21ea5ea5c77790db27a9e2bd72a66679 Mon Sep 17 00:00:00 2001
From: Rylan Polster <rslpolster@gmail.com>
Date: Wed, 5 Feb 2025 10:26:50 -0500
Subject: [PATCH] Add implicit macOS dependency to casks without explicit
 `depends_on` stanza

---
 Library/Homebrew/cask/cask.rb                              | 1 +
 Library/Homebrew/cask/dsl.rb                               | 7 +++++++
 .../Homebrew/test/support/fixtures/cask/everything.json    | 7 ++++++-
 3 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/Library/Homebrew/cask/cask.rb b/Library/Homebrew/cask/cask.rb
index 7eba153bdf..0bbe88cc10 100644
--- a/Library/Homebrew/cask/cask.rb
+++ b/Library/Homebrew/cask/cask.rb
@@ -114,6 +114,7 @@ module Cask
       return unless @block
 
       @dsl.instance_eval(&@block)
+      @dsl.add_implicit_macos_dependency
       @dsl.language_eval
     end
 
diff --git a/Library/Homebrew/cask/dsl.rb b/Library/Homebrew/cask/dsl.rb
index b602ee5cd8..d6c5d4ab12 100644
--- a/Library/Homebrew/cask/dsl.rb
+++ b/Library/Homebrew/cask/dsl.rb
@@ -390,6 +390,13 @@ module Cask
       @depends_on
     end
 
+    # @api private
+    def add_implicit_macos_dependency
+      return if @depends_on.present? && @depends_on.macos.present?
+
+      depends_on macos: ">= :#{MacOSVersion::SYMBOLS.key MacOSVersion::SYMBOLS.values.min}"
+    end
+
     # Declare conflicts that keep a cask from installing or working correctly.
     #
     # @api public
diff --git a/Library/Homebrew/test/support/fixtures/cask/everything.json b/Library/Homebrew/test/support/fixtures/cask/everything.json
index 9bc4c6af19..b247e82a05 100644
--- a/Library/Homebrew/test/support/fixtures/cask/everything.json
+++ b/Library/Homebrew/test/support/fixtures/cask/everything.json
@@ -76,7 +76,12 @@
   "depends_on": {
     "cask": [
       "something"
-    ]
+    ],
+    "macos": {
+      ">=": [
+        "10.11"
+      ]
+    }
   },
   "conflicts_with": {
     "formula": [