SwissSys has modest system requirements. Pretty much any computer running a full version of Windows from Windows 7 on up will do.
Note, however, that this rules out most Chromebooks which typically come with a reduced operating system.
Memory requirements are likewise minimal, although using the USCF All Ratings list requires at least 4GB.
Storage space demands are low. The package comes in at 22M, and the data files you create are compact JSON files.
SwissSys will also run on the Mac, provided it has Windows emulation software installed, such as Parallels, or Apple's own BootCamp.