Hold Command + Option while launching Aperture. A window will appear offering to repair permissions, repair the database, or rebuild the library.
Disk images from unverified sources frequently contain trojans, adware, or ransomware disguised as the application installer. Apple Aperture 3.6 -ked-.dmg
While Aperture 3.6 can be forced to run, its lack of official support means it is not a viable long-term solution. Many users are migrating to newer platforms like Adobe Lightroom or Apple Photos. Key Migration Tips: Hold Command + Option while launching Aperture