macosx comes pre-loaded with a feature called ‘Gatekeeper’, which is designed to help keep malicious software off of your Mac by giving you more control over what you install.
Gatekeeper will either allow you to run:
– Only applications downloaded from the Mac App Store
– Applications downloaded from the Mac App Store and from identified developers
– Any downloaded application.
These options can be found in System Preferences > Security & Privacy > ‘General’.
By default, Gatekeeper is set to ‘Mac App Store and identified developers.’ Arawak is a registered Apple developer and does code-sign applications. But from time-to-time as the underlying software we use to build Tessera (FileMaker Pro produced by Filemaker a wholly owned subsidiary of Apple) is updated we do receive support questions as Gatekeeper can report the Tessera for Mac download as coming from an “unidentified developer”.
You can temporarily bypass Gatekeeper and install Tessera by control-clicking (or right-clicking) on Tessera and on the revealed context menu, choosing ‘Open.’ On the ensuing dialogue box, choose ‘Open’ as well. This will exempt Tessera from Gatekeeper, so it can be run again by double-clicking.
For a more detailed guide to Gatekeeper refer to this article.