Opal questions & answers

Opal lets you organize ideas, reports, lists, etc. in the form of an outline.
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Question by Paul Versmissen
118 views
July 5, 2022

Unable to install Opal. Get the following message: "Opal cannot be opened because Apple cannot check the file for malicious software".

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Answer by Saumya Sharma

This is a security feature of macOS called Gatekeeper. To install Opal, right-click on the application and select "Open" from the context menu. You will be prompted with a warning, but you can click "Open" to proceed with the installation.

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