Add unsigned kext requirement.

Creates a new requirement that dictates packages are unable to install due to requiring a signed kext to function.

Closes Homebrew/homebrew#33404.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/Library/Homebrew/requirements/unsigned_kext_requirement.rb b/Library/Homebrew/requirements/unsigned_kext_requirement.rb
new file mode 100644
index 000000000..440684773
--- /dev/null
+++ b/Library/Homebrew/requirements/unsigned_kext_requirement.rb
@@ -0,0 +1,16 @@
+require 'requirement'
+
+class UnsignedKextRequirement < Requirement
+  fatal true
+
+  satisfy { MacOS.version < :yosemite }
+
+  def message
+    <<-EOS.undent
+      OS X Mavericks or older is required for this package.
+      OS X Yosemite introduced a strict unsigned kext ban which breaks this package.
+      You should remove this package from your system and attempt to find upstream
+      binaries to use instead.
+    EOS
+  end
+end