I experienced this last week on a fresh install of macOS Monteray (12.3.1). As expected, the dylib *did* have the `com.apple.quarantine` xattr set. US English error message: > "libgmpopenh264.dylib" can't be opened because Apple cannot check it for malicious software. This software needs to be updated. > > Contact the developer for more information. > > Firefox downloaded this file on May 3, 2022.
Bug 1587421 Comment 12 Edit History
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I experienced this last week on a fresh install of macOS Monteray (12.3.1). As expected, the dylib *did* have the `com.apple.quarantine` xattr set. US English error message: > "libgmpopenh264.dylib" can't be opened because Apple cannot check it for malicious software. > > This software needs to be updated. > Contact the developer for more information. > > Firefox downloaded this file on May 3, 2022.