Scratch Live will not run on macOS Catalina (10.15) or any later versions (Big Sur, Monterey, Ventura, Sonoma, Sequoia) because these operating systems do not support 32-bit applications.
Older versions like 2.4.4 and 2.1.1 are available in the Scratch Live Archive for specific hardware compatibility. serato dj scratch live download mac
The last officially supported OS was Mac OS X 10.9 Mavericks . Some users report success on macOS 10.14 Mojave, though it can be unstable. Should You Use Scratch Live or Serato DJ Pro? Scratch Live will not run on macOS Catalina (10