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