Windows : The Vensim family of software runs on Windows 10 and higher (it will not work on Windows XP, Vista, 7/8/8.1 since these are no longer supported by Microsoft). Vensim is available in both 32 and 64 bit versions.

Apple Mac : The Macintosh version requires OSX version 10.13 or higher. Vensim 8 and higher will run on 64 bit versions of MacOS (including Catalina and Big Sur). The Windows Version will run on Intel processor Macintosh machines using emulators like VMware or Crossover, or with a Windows virtual/alternate boot installation. If using Apple silicon Macs, it is strongly advised to use Vensim 8.2 onwards.

Vensim requires about 60 megabytes of disk space for a full installation and will run with any reasonable amount of memory.  For very large models more memory and disk space will be required as a single run can easily take 100 megabytes of disk space.  Generally it is a good idea to have at least as much memory as the size of the largest .vdfx file you are creating.

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