Thunderbolt 3-equipped MacBook Pro can use external GPUs, but at a cost | AppleInsider
How to use 3 or more external monitors on MacBook Pro 2015+
Adding an external GPU to your Mac is probably a better upgrade option than getting a new one | TechCrunch
Is an eGPU Worth It for Mac Users? We Ran the Tests. Here's What You Need to Know
display - When using an external monitor, does a mid-2015 Retina Macbook Pro with only integrated graphics run cooler than one with discrete graphics? - Ask Different
MacBook Pro 13-inch - Apple (IN)
Is an eGPU Worth It for Mac Users? We Ran the Tests. Here's What You Need to Know
Are external GPUs for Macs viable in macOS 10.13.4? We tested to find out | Ars Technica
Amazon.com: Razer Core X Aluminum External GPU Enclosure (eGPU): Compatible with Windows & MacOS Thunderbolt 3 Laptops, NVIDIA/AMD PCIe Support, 650W PSU, Classic Black : Electronics
Apple eGPU developer kit tested with a 15" MacBook Pro! - YouTube
New model, two-year-old processor: The 2015 15-inch Retina MacBook Pro reviewed | Ars Technica