diff --git a/Formula/autoconf.rb b/Formula/autoconf.rb
index 1587ea1c57db4..50a53ef81233b 100644
--- a/Formula/autoconf.rb
+++ b/Formula/autoconf.rb
@@ -16,8 +16,6 @@ class Autoconf < Formula
     sha256 "37e77a2e7ca6d479f0a471d5f5d828efff621bd051c1884ff1363d77c5c4675e" => :mountain_lion
   end
 
-  keg_only :provided_until_xcode43
-
   def install
     ENV["PERL"] = "/usr/bin/perl"
 
diff --git a/Formula/automake.rb b/Formula/automake.rb
index 3e66d5f549b76..4853e56b7dc05 100644
--- a/Formula/automake.rb
+++ b/Formula/automake.rb
@@ -12,8 +12,6 @@ class Automake < Formula
     sha256 "397f56ce7582b559171de62dfa772fc1a90d99bb1f03ae2f20e6824a243f7ae7" => :el_capitan
   end
 
-  keg_only :provided_until_xcode43
-
   depends_on "autoconf"
 
   def install
diff --git a/Formula/bsdmake.rb b/Formula/bsdmake.rb
index 59105d5e813b9..5592e6ed739d9 100644
--- a/Formula/bsdmake.rb
+++ b/Formula/bsdmake.rb
@@ -14,8 +14,6 @@ class Bsdmake < Formula
     sha256 "7f64345157a82d82163606a09839619ec2ffc174242ceb942c2347526fee4f83" => :mountain_lion
   end
 
-  keg_only :provided_until_xcode43
-
   # MacPorts patches to make bsdmake play nice with our prefix system
   # Also a MacPorts patch to circumvent setrlimit error
   patch :p0 do
diff --git a/Formula/cairo.rb b/Formula/cairo.rb
index 977dcbe3db2b3..a131babbde340 100644
--- a/Formula/cairo.rb
+++ b/Formula/cairo.rb
@@ -18,8 +18,6 @@ class Cairo < Formula
     depends_on "libtool" => :build
   end
 
-  keg_only :provided_pre_mountain_lion
-
   depends_on "pkg-config" => :build
   depends_on :x11 => :optional
   depends_on "freetype"
diff --git a/Formula/cvs.rb b/Formula/cvs.rb
index d474792c8959f..3dceae013a92d 100644
--- a/Formula/cvs.rb
+++ b/Formula/cvs.rb
@@ -16,8 +16,6 @@ class Cvs < Formula
     sha256 "32dcf27cf028e270e826ba9850bde2f403f77c2c16a4b534d59cf68c0446e1fb" => :el_capitan
   end
 
-  keg_only :provided_until_xcode5
-
   patch :p0 do
     url "https://opensource.apple.com/tarballs/cvs/cvs-45.tar.gz"
     sha256 "4d200dcf0c9d5044d85d850948c88a07de83aeded5e14fa1df332737d72dc9ce"
diff --git a/Formula/enscript.rb b/Formula/enscript.rb
index 07cd7e2aaf194..a8ce58c9b8ea1 100644
--- a/Formula/enscript.rb
+++ b/Formula/enscript.rb
@@ -16,8 +16,6 @@ class Enscript < Formula
     sha256 "f2be9be9caeff58dbec3c9abf3ff5554865e6a3ee4db91d156edce8ddf5e666e" => :mavericks
   end
 
-  keg_only :provided_pre_mountain_lion
-
   depends_on "gettext"
 
   conflicts_with "cspice", :because => "both install `states` binaries"
diff --git a/Formula/fontconfig.rb b/Formula/fontconfig.rb
index 3d150572e670b..3b8d64cb23f47 100644
--- a/Formula/fontconfig.rb
+++ b/Formula/fontconfig.rb
@@ -27,8 +27,6 @@ class Fontconfig < Formula
     depends_on "libtool" => :build
   end
 
-  keg_only :provided_pre_mountain_lion
-
   depends_on "pkg-config" => :build
   depends_on "freetype"
 
diff --git a/Formula/freetype.rb b/Formula/freetype.rb
index 11b20c90d639a..5c62bc19c312b 100644
--- a/Formula/freetype.rb
+++ b/Formula/freetype.rb
@@ -13,8 +13,6 @@ class Freetype < Formula
     sha256 "c1283252fcb30f5407c22b3c68bf670227f5703459c238deae568f25e5fd77c5" => :el_capitan
   end
 
-  keg_only :provided_pre_mountain_lion
-
   depends_on "libpng"
 
   def install
diff --git a/Formula/gperf.rb b/Formula/gperf.rb
index e8b2cf4db5445..c5864ab041060 100644
--- a/Formula/gperf.rb
+++ b/Formula/gperf.rb
@@ -13,8 +13,6 @@ class Gperf < Formula
     sha256 "263440c302dddec69c2140e8df2e4c00a76b76137243e712e8e8756140e0eaf5" => :yosemite
   end
 
-  keg_only :provided_until_xcode43
-
   def install
     system "./configure", "--prefix=#{prefix}"
     system "make", "install"
diff --git a/Formula/libiodbc.rb b/Formula/libiodbc.rb
index 2f70e1b80fc29..034588c4b02b0 100644
--- a/Formula/libiodbc.rb
+++ b/Formula/libiodbc.rb
@@ -13,8 +13,6 @@ class Libiodbc < Formula
     sha256 "47fecc486608df1edc094742a3afbd33c7159c8957429528e11a6fb6f551ebc4" => :mavericks
   end
 
-  keg_only :provided_pre_mavericks
-
   depends_on "automake" => :build
   depends_on "autoconf" => :build
   depends_on "libtool" => :build
diff --git a/Formula/libpng.rb b/Formula/libpng.rb
index 710f9f7613748..1a142d70a0b09 100644
--- a/Formula/libpng.rb
+++ b/Formula/libpng.rb
@@ -20,8 +20,6 @@ class Libpng < Formula
     depends_on "libtool" => :build
   end
 
-  keg_only :provided_pre_mountain_lion
-
   def install
     system "./configure", "--disable-dependency-tracking",
                           "--disable-silent-rules",
diff --git a/Formula/libtool.rb b/Formula/libtool.rb
index 0d89f68f30329..2c3f791f2b7f8 100644
--- a/Formula/libtool.rb
+++ b/Formula/libtool.rb
@@ -19,8 +19,6 @@ class Libtool < Formula
     sha256 "2e51ef82ef2bd1ad9d921a9016b9e5d7fa82d131849e2c32a3c90daa119e2eda" => :mavericks
   end
 
-  keg_only :provided_until_xcode43
-
   def install
     ENV["SED"] = "sed" # prevent libtool from hardcoding sed path from superenv
     system "./configure", "--disable-dependency-tracking",
diff --git a/Formula/md.rb b/Formula/md.rb
index 6c48ea3593e7a..f22cb8d640fd1 100644
--- a/Formula/md.rb
+++ b/Formula/md.rb
@@ -13,9 +13,6 @@ class Md < Formula
     sha256 "5faf5907b69c2a53c9bbbcfcb908d24c222181490b69116e09102212382be5ea" => :mavericks
   end
 
-  # OS X up to and including Lion 10.7 includes 'md'
-  keg_only :provided_pre_mountain_lion
-
   def install
     cd "md" do
       system ENV.cc, ENV.cflags, "-o", "md", "md.c"
diff --git a/Formula/neon.rb b/Formula/neon.rb
index 5aad60d2ef10f..5b7dad9da1e4b 100644
--- a/Formula/neon.rb
+++ b/Formula/neon.rb
@@ -13,8 +13,6 @@ class Neon < Formula
     sha256 "7348fcda6d13a8cba37a98b7ac6c9876a2ffa037714954872832d390c5a475d7" => :yosemite
   end
 
-  keg_only :provided_pre_mountain_lion
-
   depends_on "pkg-config" => :build
   depends_on "openssl"
 
diff --git a/Formula/pixman.rb b/Formula/pixman.rb
index 6dfdc4b3b65d8..61428448c9bb7 100644
--- a/Formula/pixman.rb
+++ b/Formula/pixman.rb
@@ -13,8 +13,6 @@ class Pixman < Formula
     sha256 "f92c0d581ecb7f5679d047c7e03ba17bfe169163dff5d10ac8c9ef4cb609bb0c" => :yosemite
   end
 
-  keg_only :provided_pre_mountain_lion
-
   depends_on "pkg-config" => :build
 
   def install
diff --git a/Formula/procmail.rb b/Formula/procmail.rb
index 343e0e320b820..de781c0d3076c 100644
--- a/Formula/procmail.rb
+++ b/Formula/procmail.rb
@@ -14,8 +14,6 @@ class Procmail < Formula
     sha256 "9e476567851a38caedbbb894afb83d3f5575bb494aaab296f884387feca9bf54" => :mavericks
   end
 
-  keg_only :provided_pre_el_capitan
-
   def install
     system "make", "-C", "procmail", "BASENAME=#{prefix}", "MANDIR=#{man}",
            "LOCKINGTEST=1", "install"
diff --git a/Formula/telnet.rb b/Formula/telnet.rb
index e8dad9bb02136..7bb806f402e4c 100644
--- a/Formula/telnet.rb
+++ b/Formula/telnet.rb
@@ -12,8 +12,6 @@ class Telnet < Formula
     sha256 "13911a70794917c973d7cd56450f02ec376819542053a5954cb6264ca31c21f5" => :el_capitan
   end
 
-  keg_only :provided_pre_high_sierra
-
   depends_on :xcode => :build
 
   conflicts_with "inetutils", :because => "both install 'telnet' binaries"
diff --git a/Formula/telnetd.rb b/Formula/telnetd.rb
index 9fb3bccdd1925..5a9e6aca18bf8 100644
--- a/Formula/telnetd.rb
+++ b/Formula/telnetd.rb
@@ -11,8 +11,6 @@ class Telnetd < Formula
     sha256 "73e799af3062f0b86f86f34840bc2b6b82b0ac5d17d0b451ad52155182a69983" => :el_capitan
   end
 
-  keg_only :provided_pre_high_sierra
-
   depends_on :xcode => :build
 
   resource "libtelnet" do
diff --git a/Formula/texi2html.rb b/Formula/texi2html.rb
index b281a038b8062..623c3ec645358 100644
--- a/Formula/texi2html.rb
+++ b/Formula/texi2html.rb
@@ -11,8 +11,6 @@ class Texi2html < Formula
     sha256 "5259ab2074f122f4725058d2477233add1a32c30d385680276b06c11e06bc67f" => :el_capitan
   end
 
-  keg_only :provided_pre_mountain_lion
-
   depends_on "gettext"
 
   def install
diff --git a/Formula/tnftp.rb b/Formula/tnftp.rb
index 5dacb8e83901f..75bcd7fb538e3 100644
--- a/Formula/tnftp.rb
+++ b/Formula/tnftp.rb
@@ -12,8 +12,6 @@ class Tnftp < Formula
     sha256 "fdaf7c1ab1fcb48226a9846452b352e4da302ac6aca61a74a67f97b8bb21c942" => :el_capitan
   end
 
-  keg_only :provided_pre_high_sierra
-
   depends_on :xcode => :build
 
   conflicts_with "inetutils", :because => "both install `ftp' binaries"
diff --git a/Formula/tnftpd.rb b/Formula/tnftpd.rb
index 60b0dd5cefd4c..d1175174b72ae 100644
--- a/Formula/tnftpd.rb
+++ b/Formula/tnftpd.rb
@@ -11,8 +11,6 @@ class Tnftpd < Formula
     sha256 "4ef4b7c1a35307c4a3e6b70dad1ba193aceda75920da79b0a2bd135446863d5e" => :el_capitan
   end
 
-  keg_only :provided_pre_high_sierra
-
   depends_on :xcode => :build
 
   def install