Retina iMac (5120×2880) support?

Mmm, I think there is a misunderstanding ??

The plugin is not limited to any size, it has no limitations itself. It can do whatever you allow it to do with the image you provide at first. Of course your first image has to be big enough to support your media sizes set-up in your WordPress.

Whichever retina device you are using the image requirements don’t change neither from one to another. It only depends on your website and what kind of image sizes you have set for your posts and pages. You are making your website “retina-ized”, all devices are @2x currently (2 pixels for 1) and it is the same for the iMac Retina. Do you own it by the way? It’s a beautiful machine…

Thank you. I plan to buy an iMac when it’s refreshed next, and am working on developing a blog where 4-12 megapixel images may be viewable optionally at full size, so I wasn’t sure if the plug-in would handle those but it sounds like it would. I’ve looked at that retina iMac in the Apple store and it’s a dream computer; however, it’s a bit slow pushing all those pixels (I caught some judder dragging windows) so it will take another cycle or two before it has the graphics horsepower to drive that display like silk. (Same problem happened with first retina MacBook Pro, where the graphics hardware was only barely able to drive so many pixels on the first generation machines.)

I have the MacBook Pro Retina from the first day and I had many performance troubles with it, but somehow they enhance the whole thing through software updates. Hopefully the same thing will happen with the iMac. However for games or to work on video and photos, in full-screen, it might be a pain ??