What is the correct way to take screenshot for the Mac App Store Submission? I want to submit my app to the mac app store. Mac App Store is asking for the screenshot of the dimensions 1280x800, 1440x900, 2880x1800 or 2560x1600. My samsung display does not support this dimensions. If I take the screenshot using Grab and scale it to the 1280x800 dimension it is not looking great. What is the correct way to take the screen for the MAS submission?

PS: My Samsung Supported dimensions:
640x480,720x576,800x600,1024x576,1024x768,1280x960,1344x756,1344x1008,1600x900
See the docs — in the last row of the table it says:


  One screenshot is required for Mac apps.
  Up to four additional screenshots can be uploaded. Screenshots appear on the store in the order they were uploaded in iTunes Connect.
  Screenshot requirements are:
  
  
  72 dpi, RGB, flattened, no transparency
  High-quality JPEG or PNG image file format in the RGB color space
  16:10 aspect ratio
  One of the following sizes:
  
  1280 x 800 pixels
  1440 x 900 pixels
  2880 x 1800 pixels