Snow Leopard’s USB stack is primitive. If your controller, external hard drive, and mouse share the same internal USB hub, you will get dropouts.
Support for older controllers like the Numark Mixtrack series or Pioneer DDJ-SB. Technical Optimization for 10.6.8 serato dj lite for mac os x 1068 better
However, you lose access to modern features like: Snow Leopard’s USB stack is primitive
If you use Rane hardware (like an SL2, SL3, or Sixty-Eight mixer), Scratch Live 2.5 is the final and most "polished" version for this OS. Preparation Guide Verify Hardware: Technical Optimization for 10
Before it was renamed to Serato DJ Lite, the entry-level software was called . Older versions of DJ Intro were specifically built for Snow Leopard. Serato DJ Pro & Lite - operating system compatibility
Here’s a post tailored for sharing on forums, social media, or a blog, focusing on with Mac OS X 10.6.8 (Snow Leopard).