Gaming laptop for Sims 4 with all packs

I think they will be fairly comparable in the same price range. Just be a matter of who will offer you the best specs for that price. I was kind of looking, and of course I am partial to HP bc they've always done me right, and I noticed they have an insurance type plan for like 12,00 a month. I didn't dig in to see what it covered but if it covers the graphics card and everything else decently, that would definitely sway me to another omen laptop. the one I had was fantastic on all the games I tried it on and sizeable enough at 17". I sold it and got the desktop bc I use a 65" 4k tv as a monitor atm. So my tv is on one side of the room and I have a couch on the other side. wireless keyboard and mouse. I initially did this set up bc I worked from home and decided to work in comfort rather than be cramped up sitting at a desk all of the time. Plus my dog gets to sit on the couch beside me lol. Anyway, when I got the laptop I hadn't thought out how I was going to set it up. It was too awkward to put where my desktop had been because of opening and closing it. I have cats and was worried they'd jump on it and I'd end up with a mess, then the cords, hdmi and ethernet having to plug those in and unplug them every time got old. So with all that I just decided that a laptop cannot replace a desktop for me. if I ever get another laptop it will be for doing stuff on the go, not for gaming.  

As for your mac, have you considered getting an external hard drive and moving stuff off of it? If it was within your budget you could even buy an external ssd  drive and there is a way to run your mac completely from that. If you're thinking your mac has five more years left in it, then it might be worth the investment. You can find Apple Support articles online or even call them to walk you through the process. It is like one of the most exciting times getting a new computer and I am very excited for you and want you to have it all lol. 

With that said, Puzzleaddict and Prov31Simmer will probably do better on any further advice to help you narrow it down, but I am sure whichever you decide, you still will need the cooling fan device to sit it on to keep it elevated so air can get to the vents on the bottom. 

Do post back and keep updated as I would love to hear what you finally get and how it works out. You can send me a mail too if we are not supposed to yap in here :)