4 files changed, 13 insertions, 13 deletions
diff --git a/Library/Homebrew/os/mac/cctools_mach.rb b/Library/Homebrew/os/mac/cctools_mach.rb
index 7e8f9a4d3..7e8b96b83 100644
--- a/Library/Homebrew/os/mac/cctools_mach.rb
+++ b/Library/Homebrew/os/mac/cctools_mach.rb
@@ -44,7 +44,7 @@ module CctoolsMachO
           else :dunno
           end
 
-        mach_data << { :arch => arch, :type => type }
+        mach_data << { arch: arch, type: type }
       end
       mach_data
     rescue
diff --git a/Library/Homebrew/os/mac/ruby_keg.rb b/Library/Homebrew/os/mac/ruby_keg.rb
index 8f7b37419..e476b174f 100644
--- a/Library/Homebrew/os/mac/ruby_keg.rb
+++ b/Library/Homebrew/os/mac/ruby_keg.rb
@@ -4,7 +4,7 @@ module RubyKeg
   def change_dylib_id(id, file)
     @require_install_name_tool = true
     puts "Changing dylib ID of #{file}\n  from #{file.dylib_id}\n    to #{id}" if ARGV.debug?
-    MachO::Tools.change_dylib_id(file, id, :strict => false)
+    MachO::Tools.change_dylib_id(file, id, strict: false)
   rescue MachO::MachOError
     onoe <<-EOS.undent
       Failed changing dylib ID of #{file}
@@ -17,7 +17,7 @@ module RubyKeg
   def change_install_name(old, new, file)
     @require_install_name_tool = true
     puts "Changing install name in #{file}\n  from #{old}\n    to #{new}" if ARGV.debug?
-    MachO::Tools.change_install_name(file, old, new, :strict => false)
+    MachO::Tools.change_install_name(file, old, new, strict: false)
   rescue MachO::MachOError
     onoe <<-EOS.undent
       Failed changing install name in #{file}
diff --git a/Library/Homebrew/os/mac/ruby_mach.rb b/Library/Homebrew/os/mac/ruby_mach.rb
index 0a1565f4f..5d0e75c31 100644
--- a/Library/Homebrew/os/mac/ruby_mach.rb
+++ b/Library/Homebrew/os/mac/ruby_mach.rb
@@ -33,7 +33,7 @@ module RubyMachO
         else :dunno
         end
 
-        mach_data << { :arch => arch, :type => type }
+        mach_data << { arch: arch, type: type }
       end
 
       mach_data
diff --git a/Library/Homebrew/os/mac/version.rb b/Library/Homebrew/os/mac/version.rb
index 8d96bd3b9..802ec3035 100644
--- a/Library/Homebrew/os/mac/version.rb
+++ b/Library/Homebrew/os/mac/version.rb
@@ -4,15 +4,15 @@ module OS
   module Mac
     class Version < ::Version
       SYMBOLS = {
-        :sierra        => "10.12",
-        :el_capitan    => "10.11",
-        :yosemite      => "10.10",
-        :mavericks     => "10.9",
-        :mountain_lion => "10.8",
-        :lion          => "10.7",
-        :snow_leopard  => "10.6",
-        :leopard       => "10.5",
-        :tiger         => "10.4",
+        sierra: "10.12",
+        el_capitan: "10.11",
+        yosemite: "10.10",
+        mavericks: "10.9",
+        mountain_lion: "10.8",
+        lion: "10.7",
+        snow_leopard: "10.6",
+        leopard: "10.5",
+        tiger: "10.4",
       }.freeze
 
       def self.from_symbol(sym)