Add Capture Screenshot To Clipboard From CLI as a Mac TIL

Author: jbranchaud

README.md

@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://crafty-builder-6996.ck.page/e169c61186).
 
-_1663 TILs and counting..._
+_1664 TILs and counting..._
 
 See some of the other learning resources I work on:
 
@@ -681,6 +681,7 @@ If you've learned something here, support my efforts writing daily TILs by
 - [Access All Screen And Video Capture Options](mac/access-all-screen-and-video-capture-options.md)
 - [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)
+- [Capture Screenshot To Clipboard From CLI](mac/capture-screenshot-to-clipboard-from-cli.md)
 - [Check Network Quality Stats From The Command Line](mac/check-network-quality-stats-from-the-command-line.md)
 - [Clean Up Old Homebrew Files](mac/clean-up-old-homebrew-files.md)
 - [Convert An HEIC Image File To JPG](mac/convert-an-heic-image-file-to-jpg.md)

mac/capture-screenshot-to-clipboard-from-cli.md

@@ -0,0 +1,27 @@
+# Capture Screenshoot To Clipboard From CLI
+
+MacOS comes with a `screencapture` utility that you can run from the terminal
+to activate the built-in screenshot functionality on Mac.
+
+Usually when I am taking a screenshot, I want to do something with it right
+away. Such as paste it into an application or group chat. The `-c` flag forces
+the screen capture to go the clipboard.
+
+I also generally want to capture a specific area of the screen so that the
+captured image includes the right amount of context and nothing more. The `-i`
+flag puts you in interactive screen capture mode. That means your cursor will
+turn into a crosshair that you can use to make a drag selection of the capture
+area.
+
+```bash
+$ screencapture -ic
+```
+
+Select an area to capture, it's now on your clipboard, paste it where you need
+it.
+
+Note: The first time you run this command, your terminal program (e.g. iTerm2)
+may prompt you for the necessary OS permissions in order to capture images of
+your screen. You'll need to grant those permissions and then rerun the command.
+
+See `man screencapture` for more details.