cask "conditional-flight" do version "1.2.3" sha256 "67cdb8a02803ef37fdbf7e0be205863172e41a561ca446cd84f0d7ab35a99d94" url "file://#{TEST_FIXTURE_DIR}/cask/caffeine/#{platform}/#{version}/#{arch}.zip" homepage "https://brew.sh/" on_big_sur do preflight do puts "preflight on Big Sur" end uninstall_postflight do puts "uninstall_postflight on Big Sur" end end on_catalina :or_older do preflight do puts "preflight on Catalina or older" end end end