Auto merge of #24391 - atouchet:macports, r=jdm

Remove MacPorts instructions from Readme

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README.md

@@ -54,18 +54,13 @@ Please select your operating system:
 
 Xcode version 10.2 or above is recommended.
 
-##### On macOS (homebrew)
+##### On macOS (Homebrew)
 
 ``` sh
 brew bundle install --file=etc/taskcluster/macos/Brewfile
 brew bundle install --file=etc/taskcluster/macos/Brewfile-gstreamer
 pip install virtualenv
 ```
-##### On macOS (MacPorts)
-
-``` sh
-sudo port install python27 py27-virtualenv cmake yasm llvm
-```
 
 #### On Debian-based Linuxes