SIW is an advanced System Information for Windows tool. Created by Topala Software Solutions
SIW is not available for Mac but there are a few alternatives that runs on macOS with similar functionality. The most popular Mac alternative is EtreCheck, which is free. If that doesn't suit you, our users have ranked 47 alternatives to SIW and four of them are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to SIW are Network Inventory Advisor (Paid), Systempal (Paid) and MachineProfile (Free).
