Lightroom will not launch

I'm sorry you're running into this. Since Lightroom was working just a few days ago and you've already tried resetting preferences, granting Full Disk Access, reinstalling the app, and restarting your Mac, let's try a few deeper troubleshooting steps.

1. Force quit all Adobe processes
   • Open Activity Monitor and quit any Adobe-related processes (Lightroom, Creative Cloud, Adobe Desktop Service, Creative Cloud Helper, etc.).
   • Once they're all closed, try launching Lightroom again.
2. Test in a new macOS user account
   • Create a temporary administrator account (System Settings > Users & Groups) and try launching Lightroom there.
   • If it opens in the new account, the issue is likely related to your macOS user profile rather than Lightroom itself.
3. Check whether Lightroom is crashing
   • Open Console.app and see if a crash report appears when you try to launch Lightroom. If it does, let us know what it says or share the crash log.
4. Sign out and back into the Creative Cloud desktop app
   • Sometimes licensing or background service issues can prevent Lightroom from launching.

Could you also let us know:

• Are you using Lightroom Classic or the cloud-based Lightroom?
• Which version of Lightroom is installed?
• When you try to open it, does nothing happen at all, or does the Lightroom icon briefly appear in the Dock before disappearing?
• Did your Mac install any macOS or Adobe updates between Wednesday (when it last worked) and now?

That information will help narrow down whether this is a startup crash, a catalog issue, or something related to the recent software environment.