This isn’t a big deal.
If you’re developing in Xcode, you did not buy an 8GB Mac in the last 10-years.
If you are just using your Mac for Facebook and email, I don’t think you know what RAM is.
If you know what RAM is, and you bought an 8GB Mac in the last 10-years, then you are likely self-aware of your limited demands and/or made an informed compromise.
In Memmy in iOS, it seems to “fit to screen”—meaning it shows the entire image with large black pillarboxing on either side.