Here is where the search for gets complicated.
: On macOS, the plugin content (presets and samples) is typically stored in /Library/Audio/Presets/reFX/Nexus Library Official Alternatives & Upgrades Refx Nexus v1.4.1 -Mac OSX-
On supported older systems, v1.4.1 was known for being stable, but it lacked the advanced modulation and library management features found in newer versions. Here is where the search for gets complicated