PC SPECS:
Case: Thermaltake x71
Mainboard: Asus ROG Maximus VII Hero
RAM: G.Skill F3-2666C12D-16GTXD - 16GB (2666MHz, CL12) DDR3-RAM
GPU: Asus ROG STRIX 1080 O8G (1936 MHz Boost-Clock, more OC'd to 2154MHz)
CPU: Intel i7-4790k (@4.1 - 5.2GHz, depends on use)
CPU cooler: Custom Loop. AnfiTec "drei", XSPC EC6 Blood Red coolant
HDD: 1x1TB, 1x3TB Seagate Baracuda
SSHD: 1x 2TB Seagate Desktop, 1x2TB Seagate FireCuda
SSD: 256GB Samsung 860 Pro
External Storage: 2x3TB, 1x500GB
OS: Windows 10 Professional
Front Base: Asus Dual-Bay Gaming Panel

Monitor 1: Asus ROG PG27AQ 4K
Monitor 2: Acer (whatever) 2K
Mouse: Logitech G502 Proteus Spectrum
Keyboard: Razer Blackwidow Chroma V2
Sound system: Edifier s730
Headset: ASUS Strix 7.1 (True 7.1)
Wheel: Logitech G27
What I also got: Steam Link, Steam Controller, HTC Vive
Internet speed: 150k

Schnuffelpufff

The hardware of an MacBook Pro or iMac won't make it playable. And if you got $15.000 for an maxed out iMac PRO then you can sell that unneeded piece and build a sick gaming pc that can do waaaay more than that piece or garbage that has got reliability issues since years because those GPU's and CPU's are burning away. I already saw PC Builds that are way faster at Graphics and Video processing and even Animating.