ADD: Chrisfu 's most excellent homebrew file, adjusted for my fork. REF: https://github.com/chrisfu/homebrew-proxmark3

His notes:
 :: Install homebrew if you haven't yet already done so: http://brew.sh/

 :: Tap this repo: brew tap iceman1001/proxmark3

 :: Install Proxmark3: brew install proxmark3 for stable release or brew install --HEAD proxmark3 for latest non-stable from GitHub.

proxmark3.rb

@@ -0,0 +1,39 @@
+class Proxmark3 < Formula
+  desc "Proxmark3 client, flasher, HID flasher and firmware bundle"
+  homepage "http://www.proxmark.org"
+  url "https://github.com/iceman1001/proxmark3/archive/v1.4.0.tar.gz"
+  sha256 "d8aa8a8b6df887185069fd35364e370689308f191edd9989be64b3575e312254"
+  head "https://github.com/iceman1001/proxmark3.git"
+
+  depends_on "automake" => :build
+  depends_on "readline"
+  depends_on "p7zip" => :build
+  depends_on "libusb"
+  depends_on "libusb-compat"
+  depends_on "pkg-config" => :build
+  depends_on "wget"
+  depends_on "nitsky/stm32/arm-none-eabi-gcc" => :build
+
+  def install
+    ENV.deparallelize
+
+    system "make", "-C", "client/hid-flasher/"
+    system "make", "all", "clean"
+    system "make"
+    bin.mkpath
+    bin.install "client/flasher" => "proxmark3-flasher"
+    bin.install "client/hid-flasher/flasher" => "proxmark3-hid-flasher"
+    bin.install "client/proxmark3" => "proxmark3"
+    bin.install "client/fpga_compress" => "fpga_compress"
+    share.mkpath
+    (share/"firmware").mkpath
+    (share/"firmware").install "armsrc/obj/fullimage.elf" => "fullimage.elf"
+    (share/"firmware").install "bootrom/obj/bootrom.elf" => "bootrom.elf"
+    ohai "Install success! Upgrade devices on HID firmware with proxmark3-hid-flasher, or devices on more modern firmware with proxmark3-flasher."
+    ohai "The latest bootloader and firmware binaries are ready and waiting in the current homebrew Cellar within share/firmware."
+  end
+
+  test do
+    system "proxmark3", "-h"
+  end
+end