My Mac (I assume all Mac's, and most computers in general) always takes screenshots at 72ppi... why is this? Also, it seems 72ppi is the default pixel density for just about everything. Again, WHY??? Doesn't this seem counter-intuitive when it comes to image size? The difference, although small, can be very noticeable when viewed at 100% actual size. Screenshot 72ppi ...here is a regular screenshot, unedited. Screenshot 99.28ppi ...here is a screenshot modified to 99.28ppi (my displays native pixel density), the way I want screenshots to be taken by default. Comparison ...when compared in Preview with the preference option "Define 100% scale as:" set to "Size on screen equals size on printout" (I prefer a true WYSIWYG experience). Let me rephrase my question: It's been explained to me and I've read several articles on the subject. I still disagree with the reasoning for why 72ppi is the default and I'm asking for a hack or third-party app to take screenshots at a pixel density of my choosing. ...or do I have to resort to manually changing it after the fact using something like Pixelmator or Photoshop? At this point I'm having to settle with a folder action that takes a new screenshot and modifies the pixel density in Pixelmator. Adds about 5 seconds of "lets stare at the screen while automator moves the mouse around".