Memory * 16 GB of RAM for HD media. * 32 GB or more for 4K and higher. Adobe Help Center Useful New Features in After Effects 2020 - the Adobe Blog
To run this version effectively on macOS, your system should meet these standards: After Effects System Requirements - Adobe Help Center Adobe After Effects CC 2020 v17.0.2 for Mac Download
: Improvements to preview and playback performance, as well as faster processing for Content-Aware Fill for video. Memory * 16 GB of RAM for HD media