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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, like most circuit simulators, requires a text-file description of the circuit as input. This netlist 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 more...

What's New

Version 2.10.35:

  • New frontend variable '$processor'.
  • Graph layout:
    • handling of cases whent there are more than four labels in the legend;
    • improved formatting of units and labels for axes.
  • Better detection of syntax errors in variable expressions.
Bugs fixed:


OS X 10.4.11 or later

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MacSpice User Discussion

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Myschizobuddy Member IconComment+120

please merge with Solve Elec

Reply1 reply
Version 2.10.29

I can download the app, but can anyone tell me why that when I open it, it just opens a page of code?

Iliketrash Member IconComment+206

A huge, huge thanks to Mr. Williams for his continuing work in developing, documenting, improving, and supporting Spice on the Mac.

Reply0 replies
Version 2.10.26
Karl Becker Member IconReview+0
Karl Becker

Works just as I hoped, and let me finish a homework problem just now that would have otherwise required me to take a twenty minute trip to the lab.

Only thing that could be improved is better documentation - as in, easy-to-read PDF files written by a knowledgeable engineer. I'm trying to do some stuff with diodes and am at a little loss as to how to accurately represent them. I know this program is designed for people already familiar with spice, though, so I can't fault the program much.

Great job! And freeware?! You win the prize for best software of my day!

Reply0 replies
Version 3f5 2.8
Anonymous Member IconReview

This is the best program out there for you engineering majors. The alternative--get the emulator VPC 6.0 and a cup of coffee, then wait for your simulations to run.

Reply1 reply
Version 3f5 R6
Charles Williams (Developer)

Thanks for the comments. I am suprised by your 2 star rating for stability. I have no unresolved bug reports relating to this so please let me know what problems you have found and I will address them. C.

user icon+8
Leslie Titze
Version 2.10.29
user icon+8
Leslie Titze
Version 2.10.27
> 5 4


Current Version (2.x)


Downloads 35,522
Version Downloads 314
License Free
Date 28 Jul 2014
Platform OS X / PPC 32 / Intel 32
Price Free
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