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Flexible server monitoring

Introducing Simon 5!

Simon version 5 is now available. It is a massive update, introducing a much-requested feature: syncing the Simon data between multiple Macs, plus a Simon Status service, a Link Checker filter, improved Find filter, iMessage and Speak Error notifiers, a new app icon, and much more.

Important: please note that Simon 5 requires a minimum of macOS 10.12 (Sierra), and is a paid upgrade from Simon 4. Purchasers since September 1, 2020 automatically get a version 5 license (that also works in previous versions).

Read the Simon What's New page for details.

Simon 3.4 Download Damaged


When I download Simon 3.4 from the site and try to run the setup I get the following message;

"Simon" is damaged and can't be opened. You should move it to the Trash.

Could you kindly check that the file is not corrupted on the server.

Thank you.

David Sinclair's picture

Re: Simon 3.4 Download Damaged

That is a known issue with Simon 3.4. It dates from before the Gatekeeper (aka Developer ID) feature was introduced in OS X 10.6. You should only use this version on OS X 10.5; if you're on 10.6 or later, use Simon 3.6.1 (or the latest version) instead.

If you do need to run Simon 3.4, you can bypass this error by temporarily changing your Security & Privacy system preferences to allow apps downloaded from Anywhere. Once you launch it once, you can change this preference back to the previous selection.