Wed Feb 24, 2021 12:39 am
Your system can't handle more than HD and even that without complex effects.
And then, please check if El Capitan is meeting the minimum requirements. You may need High Sierra.
Don't approach Resolve with your expectations from other NLEs! They are all different.
Resolve Studio 17.1.1 and Fusion Studio 17, macOS 10.15.7
iMac 2017 Radeon Pro 580 8 GB VRAM, 32 GB RAM
2018 Mac mini 16 GB RAM, eGFX Breakway RX 580 MacOS 10.14.6