According to the official release notes, Soundtoys 4.1.8 addressed:
Title: Analysis of Soundtoys Native 4.1.8: Compatibility, Performance, and Plugin Architecture on macOS
Outline:
System Requirements for 4.1.8 on OS X
Key Features
Performance Metrics
Conclusion
Version 4.1.8 handles parallel processing beautifully. Create an Aux track (Send/Return) in Pro Tools or Ableton. Insert Decapitator 100% wet. Use the "Thump" and "Air" filters (hidden in the advanced panel). Blend this into your drums. Your kick and snare will hit twice as hard.
Soundtoys 4.1.8 is NOT compatible with Apple Silicon Macs natively, nor is it compatible with macOS Catalina (10.15) or newer (Big Sur, Monterey, Ventura, Sonoma). Soundtoys Native 4.1.8 Osx
If you are running a modern Mac with an M1 or M2 chip, you need Soundtoys 5 (currently 5.3.x or higher) which offers Universal Binary 2 support. Version 4.1.8 is strictly for Intel-based Macs running legacy operating systems.
The "Devil-Loc" (included in the bundle as a simple plugin) is a brutal compressor. For transparent parallel glue, turn the "Crush" knob down to 9 o'clock and the "Release" to 3 o'clock. Mix it in at 20% on drum buses. It adds aggression without destroying transients. According to the official release notes, Soundtoys 4