http://blog.n-z.jp/blog/2013-11-13-killall-distnoted-periodically.html のコメントのパッチを試す (`brew edit emacs` で以下の emacs.rb.diff のように変更して `brew reinstall emacs`)

emacs-inline.patch.diff

diff --git a/emacs-inline.patch.sfjp b/emacs-inline.patch.gist
index 52f2052..d67ad1d 100644
--- a/emacs-inline.patch.sfjp
+++ b/emacs-inline.patch.gist
@@ -1015,7 +1015,7 @@ diff -r -N -p ../emacs-24.3.org/src/nsterm.m src/nsterm.m
                                                name: nil object: nil]; */
 +   [[NSDistributedNotificationCenter defaultCenter] addObserver: NSApp
 + 					selector: @selector (changeInputMethod:)
-+ 						   name: @"AppleSelectedInputSourcesChangedNotification" object: nil];
++ 						   name: @"AppleSelectedInputSourcesChangedNotification" object: nil suspensionBehavior:NSNotificationSuspensionBehaviorDeliverImmediately];
   
     dpyinfo = xzalloc (sizeof *dpyinfo);
   

emacs.rb.diff

diff --git a/Library/Formula/emacs.rb b/Library/Formula/emacs.rb
index 712c3d1..5ce4ce2 100644
--- a/Library/Formula/emacs.rb
+++ b/Library/Formula/emacs.rb
@@ -47,7 +47,7 @@ class Emacs < Formula
     # "--japanese" option:
     # to apply a patch from MacEmacsJP for Japanese input methods
     if build.include? "cocoa" and build.include? "japanese"
-      p[:p0].push("http://sourceforge.jp/projects/macemacsjp/svn/view/inline_patch/trunk/emacs-inline.patch?view=co&revision=583&root=macemacsjp&pathrev=583")
+      p[:p0].push("https://gist.github.com/anonymous/8142555/raw/d67ad1dc814579d125afbd18de3a62ba69895601/emacs-inline.patch")
     end
     p
   end unless build.head?