Apple’s notarization requirements have changed. If you see "…cannot be opened because the developer cannot be verified" :
Version 7.1.36 improved the node-based editor. For complex shaders (e.g., carbon fiber, frosted glass with bubbles), the Material Graph allowed artists to blend textures procedurally without leaving the real-time environment. Luxion KeyShot 7 v7.1.36 macOS.dmg
KeyShot 7.1.36 was designed for macOS Sierra (10.12) and High Sierra (10.13). While it may run on newer macOS versions via Rosetta or compatibility modes, it is not natively optimized for M1/M2/M3 chips. Apple’s notarization requirements have changed