Support
Write to us and a person will answer.
Contact
E-mail: [email protected]
We read every message and reply as soon as we can.
What helps us help you
- Your CirSpice version, from CirSpice > About CirSpice.
- Your Mac model and macOS version.
- What you did, what you expected and what happened instead.
- The text from the Messages tab, if a file did not open or run.
- The .CIR file, if you are free and willing to share it. We use it only to look into your problem.
Common questions
Which files does CirSpice open?
Schematic files saved by Micro-Cap, with the .CIR extension. A SPICE text netlist that happens to be named .cir is a different kind of file and does not open.
My file opens but will not run. Why?
Open the Messages tab in the sidebar. It names the part, model or analysis that CirSpice cannot simulate yet, and says why. CirSpice never swaps in a guess for something it does not support.
If the reason is not clear, send us the Messages text and we will help.
Do I need Micro-Cap?
No. CirSpice is a separate app. It does not include Micro-Cap, which is a product of Spectrum Software.
If a circuit uses a part that CirSpice does not have, the Messages tab names it. If you have Micro-Cap installed, File > Import Micro-Cap Library can read the part from your own installation.
Will the results match Micro-Cap?
They can differ. CirSpice simulates with ngspice, which is a different simulator. Differences show most in fast switching edges and in circuits that are hard to converge. Check anything critical before you rely on it.
What happens to my file when I save?
It is still a .CIR file. CirSpice keeps its own settings in a separate file next to it and adds nothing to your circuit file. As with any new tool, keep a copy of important files before you edit them.
How do the trial and the purchase work?
Opening, viewing and exporting are free, with no time limit. The first time you edit or run, CirSpice offers a 14-day trial of everything. It starts only when you accept. After the trial you can still open and view files.
CirSpice Standard is a single purchase on the Mac App Store that unlocks editing, saving and simulation. There is no subscription.
I bought CirSpice and it is still locked.
Choose CirSpice > Restore Purchases while signed in to the App Store with the Apple Account you bought it with. If that does not help, write to us.
How do I get a refund?
Apple handles payments and refunds for Mac App Store purchases. Ask Apple at reportaproblem.apple.com. We never see your payment details and cannot issue the refund ourselves.
Does CirSpice send my circuits anywhere?
No. CirSpice works entirely on your Mac and never connects to the internet. See the privacy policy.
Where is the license agreement?
CirSpice comes with a license agreement, which is shown on CirSpice's App Store listing.
Is there a version for Windows, iPad or iPhone?
Not today. CirSpice is for the Mac.
How do I report a security problem?
Write to [email protected] with "Security" in the subject. Please give us reasonable time to fix it before you publish.
Where is the source code of ngspice?
On the Source page, with the licenses of every open source component in CirSpice.