Add Access Unsupported Screen Resolutions With RDM as a mac til

README.md

@@ -10,7 +10,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 For a steady stream of TILs from a variety of rocketeers, checkout
 [til.hashrocket.com](https://til.hashrocket.com/).
 
-_771 TILs and counting..._
+_772 TILs and counting..._
 
 ---
 
@@ -317,6 +317,7 @@ _771 TILs and counting..._
 ### Mac
 
 - [Access System Information On OS X](mac/access-system-information-on-osx.md)
+- [Access Unsupported Screen Resolutions With RDM](mac/access-unsupported-screen-resolutions-with-rdm.md)
 - [Clean Up Old Homebrew Files](mac/clean-up-old-homebrew-files.md)
 - [Default Screenshot Location](mac/default-screenshot-location.md)
 - [Disable Swipe Navigation For A Specific App](mac/disable-swipe-navigation-for-a-specific-app.md)

mac/access-unsupported-screen-resolutions-with-rdm.md

@@ -0,0 +1,14 @@
+# Access Unsupported Screen Resolutions With RDM
+
+If you visit the _Display Settings_ for your Mac, you'll find that you only
+have a handful of screen resolution options. For standard use, you'll get by
+with these. If you need a specific, unsupported resolution you'll need help
+from a 3rd party tool. There are many options out there.
+[RDM](https://github.com/avibrazil/RDM) is a free and open-source option.
+
+Once you have it installed and have given it _Accessibility_ permissions,
+open the menu from your top toolbar and select the resolution you are
+looking for.
+
+I use RDM to adjust my screen resolution to 1280x720 for optimal
+screencasting.