Hi @lamiri0101, welcome to the community! Could you let us know which version of Lightroom you’re using? Also, does this happen right when you launch the app, or only after a specific action? As a first step, resetting Lightroom’s preferences can sometimes help. If the app won’t start, you may need to use the manual reset method. You can follow the steps here: https://adobe.ly/4qv2yGA Thanks! Alek
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Log on to Lightroom Web (https://adobe.ly/3XVZmIp) and ensure everything is synced and backed up before proceeding.
Choose Go > Go To Folder in the Finder window and type ~/pictures. Locate a bundle named Lightroom Library.lrlibrary.
Right-click or control-click this bundle and choose Show Package Contents. You'll find a folder inside it with a long cryptic string of numbers and letters (for example: d1a4f88d2b534c7d91022136fd182532). Open that folder.
In the folder, move out all the files named Managed Catalog.[anything] to the Mac's desktop.
Launch Lightroom.
Let me know how it goes. Thanks! Sameer K
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