WhatsYourSign
WhatsYourSign is a macOS security utility that adds Finder signing details so you can quickly inspect a file's code signature and trust status.
What is WhatsYourSign?
WhatsYourSign is a macOS security utility for checking the code-signing details of files directly from Finder. It helps Mac users inspect whether an item is signed, who signed it, and whether the signature looks trustworthy before opening or sharing the file. The app adds a contextual Finder option so you can view signing information with a right-click instead of using command-line tools. It can also show file hashes and available entitlements, which is useful for security-conscious users, developers, IT staff, and anyone reviewing unfamiliar apps or installers. WhatsYourSign is designed for local inspection on Mac and fits naturally into everyday download checks, troubleshooting, and malware-awareness workflows. Objective-See publishes it as part of its macOS-focused security tool lineup.
Key features
- View code-signing information from the Finder right-click menu
- Check whether a file is signed and identify its signer
- See trust indicators for Apple-signed, third-party signed, or unsigned items
- Display MD5, SHA-1, SHA-256, and CDHash values for supported items
- Inspect entitlements embedded in signed apps and binaries
- Use a simple graphical interface instead of command-line signature checks
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Safety overview
Status: Safe
WhatsYourSign is a legitimate macOS security tool whose behavior matches its purpose: it integrates with Finder to display signing information for files you inspect. You may see it listed in macOS Extensions or Login Items and Extensions because Finder integration is part of how the tool works. Network access can occur when macOS checks notarization or certificate status with Apple services, and the app can also check for its own updates when you request that. Treat any signing result as one safety signal rather than a guarantee that a file is harmless.
Recommendation: Keep WhatsYourSign if you use it to inspect downloads, apps, scripts, or other files before opening them. If you no longer want Finder integration, uninstall it using its installer or remove the app according to the publisher's instructions; doing so will only remove its signing-info feature from Finder.
Common paths
/Applications/WhatsYourSign.app
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