Member Avatar for lacyb

I accidentally told my computer not to trust the app that adds photos to my FAce Book page. How do I get it to trust it again?

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Short summary: was right that the old Facebook photo-uploader was implemented as a Java applet, so the “don’t trust” choice can live in two places — macOS’s certificate/trust store or the Java runtime’s settings — and which one you must change depends on whether you declined a certificate (Keychain) or told Java to block the applet. Modern browsers have also phased out the plugin model that ran applets, so if you can’t get the applet to re-run you may need a different uploader (see notes below). (java.com)

If it’s a certificate-level decision: open Keychain Access, find the certificate related to the site or publisher, double‑click it, expand Trust and change “When using this certificate” to Always Trust (you’ll be asked for an admin password). That restores trust at the OS level for Safari/Chrome on macOS. Apple documents how trust policies are applied in Keychain. (support.apple.com)

If it’s Java remembering “don’t run”: open the Java Control Panel on your Mac (System Preferences → Java), go to Security → Edit Site List and either remove the site from the list or add the app’s URL so Java will allow it to run. Java also stores user deployment settings (deployment.properties and security/exception.sites) under your Library/Application Support/Oracle/Java/Deployment if you need to edit or delete those files to force re‑prompts. Only add sites you 100% trust. (java.com)

Reality check and safe alternatives: most current browsers disabled NPAPI plugins (so applets often won’t run at all in Chrome/Firefox). If the applet cannot be re-enabled, use Facebook’s built‑in uploader or the Facebook desktop/mobile app instead; avoid lowering global security settings just to run one legacy applet. For background on browser plugin deprecation and macOS/Java notes see the Java and browser vendor docs. (blog.chromium.org)

(As suggested, browser resets can sometimes help, but start by checking Keychain and the Java Control Panel so you don’t make broad privacy/security changes.)

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Member Avatar for rundie

Is the app a browser extension of some kind? sounds like you need to trash some preferences/cookies...

Member Avatar for ilaureano

The FaceBook photo add app is a Java applet, as it takes the photo files from the hard disk, it needs permition, so the computer needs to trust it. In my case, the browser asks every time I try to upload photos. rundie is right. Try to delete the cookies and cache in your browser preferences panel.
In the control menu for the browser (guess you use Safari, I prefer Firefox/Camino), the "Control menu" is the menu which has the browser name, next to the Apple menu, the shortcut key for the Prefernces panel is is Command+,
In the tabs Privacy/Security/Advanced are the control and configuration buttons for cookies, historial (controls the cache) and certifications (controls wether the computer trust an app, refuses the acces or asks everytime).

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