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.
Now that the cat #19 is out of the bag, test it as much as you can and use the subforum.
Studio 18.6.6, MacOS 13.6.6, 2017 iMac, 32 GB, Radeon Pro 580
MacBook M1 Pro, 16 GPU cores, 32 GB RAM and iPhone 15 Pro
Speed Editor, UltraStudio Monitor 3G