I made a video where I clocked the booting times for MacOS Sierra (10.12.6) and Windows 10 from an eSDD connected to the new 4K iMac (2017).
Specs:
These are the specs from the machine I picked up:
iMac (Retina 4K, 21.5-inch, 2017)
Processor: 3,4 GHz Intel Core i5 (quad-core)
Memory: 8 GB 2400 MHz DDR4
Graphics: Radeon Pro 560 4GB
Storage: 1TB Fusion Drive
external SSD: Freecom mSSD MAXX 512GB (USB-C / USB3.1 GEN2)
Link: http://www.freecom.com/product/mssd-m...