macOS 10.14 or later (preferably 10.14.5+) with Metal support and 2GB of VRAM.
Version 8.4.1 builds upon the core features of the 8.4 release, which introduced substantial architectural changes: Adobe Photoshop Lightroom Classic CC 2019 8.4.1...
After years of requests, PNG was finally added as a native export format. macOS 10