I am using a 2012 Mac Pro and I love it and plan to use it for several more years. I do not love any current macs except the 2019 macPro which I can't afford.
I don't think 6 cores is enough though. But you'll be closer to 2k if you get a 12 core fully loaded machine like mine. I also upgraded mine to the fastest CPU possible 3.46ghz. I think $1k is kind of a lot for the 6 core machine you quoted, but maybe not, I haven't really investigated those. I bought mine refurbished, came with a warranty, but you might find used ones for less.
In answer to your question, yes LogicPro will use multiple cores. I did some benchmarking and will try to find the results, but basically I wanted to compare geekbench reports from my 2012 MacPro against newer models..and basically the jist of it is, that the 2012 MacPro, if fully loaded with 12 cores at 3.46ghz doesn't do half bad at multi-core scores. It does better then current mini actually, but the mini does better at single core performance, which is what matters for your live channel you are hosting instruments. But I haven't found any instruments keeping me down just yet.
Also the 2012 MacPro does not have AVX in the CPU, which means you won't be able to run MassiveX or ModoDrums... Those are the only products I know of that require AVX as of now, but that could always change in the future.
Also the 2012 MacPro was officially deprecated by Apple, you will not be able to officially run Catalina on it. Though it is still possible to install Catalina and it apparently works fine. I'm happy on Mojave for the foreseeable future. I plan to get 2-3 more years out of this box as my primary machine, after that we shall see.
Anyway, I personally think a 6 core you are considering may disappoint you a little. You can go to the geekbench site and compare scores of various machines, I'm sure there will be scores there for that model. Compare it to say, my model...your single core scores will be about like mine...ok, but not great...and your multicore scores will also be ok, not great. But... I guess a fully loaded up 12 core like mine is probably closer to $2k...its been that much for a long time and is still holding its value due to the 2019 Mac Pro being so expensive.
I use PCI and also I like using my 4k 32" monitor, like I said, so for me I'm very happy with this setup and would absolutely not trade it for any mini or iMac that is currently available, regardless of $$$. I will use this until the price of new MacPros comes back down to reality somehow... So its great, but I did go with 12 cores and I later even upgraded from 3.33 to 3.46ghz just to have the absolute fastest and bestest 2012 MacPro I could make. And i'm quite happy with it...but I don't know how I'd feel about 6 cores. But... The machine you spec'd is half the price too...so there is always that.
FWIW, when I get a new mac eventually, I think this macpro will still be quite functional for quite some time to come in some kind of capacity...a file server, VePro slave, windows machine even if I have to. Its definitely the best computer I have personally ever owned and I love using it every single day.
Last edited by Dewdman42
on Tue Apr 21, 2020 12:29 pm, edited 1 time in total.
5,1 MacPro 3.46ghz x 12 128gb ram, OSX 10.14, Logic Pro 10.4.8, Mainstage3, Cubase10, StudioOne, Reaper, DP9, VEP, VSL, too many plugins to list