(Insert funny hello message here)
Hello from Australia!
I have already got a laptop, eGPU enclosure and power supply ready and waiting for a single cable to arrive in the mail, once that arrives you can be sure to see my eGPU build guide, all of the (many) problems I have faced and how I have either dealt with or temporarily ignored every single one 🙂
Lenovo Thinkpad W540 (i7 4700mq, 16GB RAM, Quadro K1100m, 500GB SSD, 2TB SSHD)
AMD RX 570 eGPU
Good luck with your build! (by the by, your Macbook uses the same CPU as does my Lenovo X220T).
Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts