Hey guys thought I'd share what I'm using as I find it quite an amazing set up. I never shoot Lossless, maximum I shoot is RAW 3:1 with my Ursa Mini 4K EF. So keep that in mind! I can edit my 4K RAW 3:1 footage with zero lag inside of Resolve 14 with my set up. No caching!
Performance mode checked Playback quality 1/4 Timeline in 1920x1080 until delivery time
Macbook pro mid 2015 that you can only order online with the extra gpu thing. And make sure your footage is on a SSD not hard drive. Thats it literally. No lag. I got a 1TB SSD for 300 canadian dollars off amazon. Crucial SSD its called. 380 read/write speed i tested it at.