If you’re looking to reinstall OmniGraffle 4 on an older system, provided below are download links to re-download the latest version of OmniGraffle 4 for Mac:
Please note that OmniGraffle 4 was last updated in 2008 for Mac OS X 10.5 Leopard, and as such, does not contain any specific fixes for newer operating systems. We haven’t tested OmniGraffle 4 against Mac OS X 10.6 or later, so it’s possible your mileage may vary when running this application on newer versions of the OS.
OmniGraffle 7 was released on October 10th, 2016, and we’re happy to offer an upgrade discount for existing customers. You can learn more and download a trial here
OmniGraffle 4 on macOS Sierra
Opening OmniGraffle v4 on macOS Sierra 10.12 can result in an error message of “”OmniGraffle.app” is damaged and can’t be opened.” This can appear due to Mac OS’s Gatekeeper, which checks for a developer signature to make sure this app came from a trusted source. OmniGraffle 4 predates the entire Gatekeeper ecosystem, so it lacks the code that Apple is looking for to validate the app’s legitimacy.
To exempt an app from Gatekeeper, Right-click or Control-click it, and select Open from the contextual menu. Click Open again in the dialog box to confirm, and enter your administrative credentials if required.
That being said, we have had at least some users report that OmniGraffle 4 is no longer operable at all for them on the latest OS, even after resolving this Gatekeeper issue. If the above steps don’t allow you to work around the issue, you may need to upgrade your license in order to run a version that offers compatibility with this operating system.
OmniGraffle 4 on macOS High Sierra
OmniGraffle 4 and OmniGraffle Professional 4 are incompatible with macOS High Sierra 10.13 due to underlying OS changes. Your existing documents will remain intact on your computer and can be opened with newer versions, but OmniGraffle 4 will no longer launch after upgrading your operating system. Existing customers are eligible for discounted upgrade pricing for OmniGraffle 7.
Last Modified: Oct 18, 2017