Terry, As I know, AnyLogic 5 was developed and tested only under Windows OS. As for the model performance, there are a lot of possible causes, e.g. inside AnyLogic Engine, external libraries (if you use them), etc. Probably if you build this model in AnyLogic 6, it will run faster but there are no any guarantees since AnyLogic 6 was not also tested under Unix Server environment: http://www.xjtek.com/support/download/sysreq/