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MacSpice is an electronic circuit simulator. Circuit simulation is a way of building and testing virtual models of electronic devices. It is usually cheaper and quicker to simulate a design than to build a prototype. MacSpice uses a text-file 'netlist' description of the circuit as input. This is a list of components and the nodes they connect to. Users may prepare netlists with a text editor, or derive them from a circuit diagram using a third-party schematic-capture application. MacSpice then builds a numerical model of the circuit and analyses this.

A command interpreter (shell) is used to specify the types of

What's New

Version 3.1.12:
  • Improve behaviour when executable is used as command line tool.
  • Modify parsing of .options, etc. to be more tolerant of numerical values with trailing garbage, e.g. 'CJ=.2MF/M^2' and garbage.
  • Modify back-quote evaluation to use posix_spawn(2) instead of vfork(2).
  • Improve error reporting for 'alter', 'altermod' and


  • OS X 10.6 or later

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MacSpice User Discussion

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Current Version (3.x)


Downloads 40,863
Version Downloads 265
License Free
Date 31 Aug 2016
Platform Intel 64 / OS X / Intel 32
Price Free
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