Before Adobe acquired Allegorithmic, the software operated on a perpetual licensing model. Version 2019.3.3 represents one of the last major stable releases before the transition to a strict subscription model (Adobe Substance 3D Painter).
Before installing, ensure your system meets these specifications for the 2019/2020 era: Before Adobe acquired Allegorithmic
Since this is an older version, macOS Gatekeeper might flag it as an "unidentified developer." To fix this: Go to System Preferences > Security & Privacy . Under the General tab, click Open Anyway . click Open Anyway .