I ran into this too, and it’s unfortunate that the plugin doesn’t handle it gracefully. What I did was make my own define for IOS_BUILD at the top of PreciseLocale.cs
#if UNITY_IOS && !IOS_SIMULATOR // The iOS plugin for this crashes in the simulator, so don't use it if in simulator mode.
#define IOS_BUILD
#endif
Then in the rest of the code, replace UNITY_IPHONE with IOS_BUILD (UNITY_IPHONE is considered obsolete anyway, so the author should change it).
Then, when you want to build for the simulator, you have to add IOS_SIMULATOR to the Scripting Define Symbols under “Other Settings” on the build settings (a little bit under where you have to choose “Simulator SDK” for Target SDK).
