With the impending demise of Aperture, I've been looking at alternative post processing software. From what I've seen, the combination of PaintShop Pro X7 and AfterShot Pro 2 from Corel look great, but they aren't Mac compatible. That's a Bummer. I refuse to make monthly payments for software, so Adobe products are out! Plus, once you dump Adobe, as I did, you realize what a heavy load their overweight code puts on your system.
I notice very much how demanding Adobe-ware is. When I run LR, this windows system is constantly cooling. I have an old PS CS2 in which I often work with files that are a couple of 100 MB and the PC handles that just fine.
Too bad that old PS doesn't work on my Macbook else I'd keep using that one.