I recently got a retina display MacBook, and all my screenshots (via ⌘ CMD+⇧ SHIFT+3 or ⌘ CMD+⇧ SHIFT+4) end up being twice the size compared to how they appear on-screen.
For example, here is a screenshot of the Ask Different logo taken via ⌘⇧4 on a retina MacBook Pro running macOS 10.15.7:
When the file is opened locally in Preview or Quick Look, it appears at the same size as the website's logo. But when uploaded to the web, it displays twice as big.
How can I stop this from happening?
Best Answer
Here is the most convenient solution (Taken from http://www.quora.com/How-can-I-get-my-retina-Mac-to-not-take-screenshots-that-are-too-big and modified a bit)
Use OsX embedded Automator to downsize screenshots automatically after they taken.
Here is saved workflow file