My Sony Vaio was the worst computer I ever owned. Repetition strain injury keyboard that fell apart with use. Not a novelist's computer, in my opinion.
Do I love Mac?
I write my novels and research on a 27" iMac Retina, using the screen to hold two open programs side-by-side. I use the inbuilt Mac dictation and far prefer it to Dragon software. I did invest in a fantastic microphone for when I dictate from the treadmill.
The 21" iMac is set up for dictation and Video display at my treadmill.
11" Mac Book is my short trip computer. For longer trips I pack the 21"
Add to those a large and a mini iPad and the iPhone and you can see that I'm an obsessed Apple products lover. I've just been window shopping the Apple sport's watch.
I've had no problems with any Mac I've owned running anything designed for Mac, certainly not a problem loading into Createspace. The 21" Mac has been roughly bounced around outback roads in a trailer for six years, and still works perfectly.